keyword
MENU ▼
Read by QxMD icon Read
search

organic solar cell

keyword
https://www.readbyqxmd.com/read/28742058/ito-with-embedded-silver-grids-as-transparent-conductive-electrodes-for-large-area-organic-solar-cells
#1
Bhushan Ramesh Patil, Mina Mirsafaei, Pawel Piotr Cielecki, Andre Luis Fernandes Cauduro, Jacek Fiutowski, Horst-Guenter Rubahn, Morten Madsen
In this work, development of semi-transparent electrodes for efficient large area organic solar cells (OSCs) has been demonstrated. Electron beam evaporated silver grids were embedded in commercially available ITO coatings on glass, through a standard negative photolithography process, in order to improve the conductivity of planar ITO substrates. The fabricated electrodes with embedded line and square patterned Ag grids reduced the sheet resistance of ITO by 25 % and 40 %, respectively, showing optical transmittance drops of less than 6 % within the complete visible light spectrum for both patterns...
July 25, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28737255/efficient-organic-solar-cells-with-non-fullerene-acceptors
#2
REVIEW
Shuixing Li, Wenqing Liu, Chang-Zhi Li, Minmin Shi, Hongzheng Chen
Fullerene-free OSCs employing n-type small molecules or polymers as the acceptors have recently experienced a rapid rise with efficiencies exceeding 12%. Owing to the good optoelectronic and morphological tunabilities, non-fullerene acceptors exhibit great potential for realizing high-performance and practical OSCs. In this Review, recent exciting progress made in developing highly efficient non-fullerene acceptors is summarized, mainly correlating factors like absorption, energy loss and morphology of new materials to their correspondent photovoltaic performance...
July 24, 2017: Small
https://www.readbyqxmd.com/read/28736950/impact-of-interfacial-layers-in-perovskite-solar-cells
#3
An-Na Cho, Nam-Gyu Park
Perovskite solar cell (PCSs) is composed of organic-inorganic lead halide perovskite as light harvester. Since the first report on long-term durable 9.7% efficient solid-state perovskite solar cell in 2012, organic-inorganic halide perovskite received great attention because of its superb opto-electronic properties. As a result, a power conversion efficiency (PCE) exceeding 22% was certified. Controlling grain size and grain boundary of perovskite layer perovskite is important for attaining high efficiency...
July 23, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28733882/prediction-of-the-lowest-charge-transfer-excited-state-energy-at-the-donor-acceptor-interface-in-a-condensed-phase-using-ground-state-dft-calculations-with-generalized-kohn-sham-functionals
#4
Shaohui Zheng, Mengyue Xiao, Yongping Tian, Xue Chen
Knowledge of the charge (electron) transfer process at the donor-acceptor interface is required to understand the working mechanisms of different organic photovoltaic materials. Investigating the lowest charge-transfer state in organic donor-acceptor solar cells is important as it allows the destruction/formation of excitons and polarons to be studied, and is directly related to the open circuit voltage. By performing low-cost and feasible calculations of ground-state electronic structures using the Mulliken rule as well as the optimally tuned range-separated hybrid (OTRSH) density functional and a regular long-range corrected functional, the lowest charge-transfer (CT) state energies of a series of dimers containing functionalized anthracene (the donor) and tetracyanoethylene (the acceptor) were obtained...
August 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28733664/charge-injection-carriers-recombination-and-homo-energy-level-relationship-in-perovskite-solar-cells
#5
Jesús Jiménez-López, Werther Cambarau, Lydia Cabau, Emilio Palomares
We present a comparative study between a series of well-known semiconductor polymers, used in efficient organic solar cells as hole transport materials (HTM), and the state-of-the art material used as hole transport material in perovskite solar cells: the spiro-OMeTAD. The observed differences in solar cell efficiencies are studied in depth using advanced photoinduced spectroscopic techniques under working illumination conditions. We have observed that there is no correlation between the highest occupied molecular orbital (HOMO) energy levels of the organic semiconductors and the measured open-circuit voltage (VOC)...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28731698/regiocontrolled-electrosynthesis-of-60-fullerene-bisadducts-photovoltaic-performance-and-crystal-structures-of-c60-o-quinodimethane-bisadducts
#6
Zong-Jun Li, Sisi Wang, Shu-Hui Li, Tao Sun, Wei-Wei Yang, Kazutaka Shoyama, Takafumi Nakagawa, Il Jeon, Xiaoniu Yang, Yutaka Matsuo, Xiang Gao
C60 o-quinodimethane bisadducts (C60(QM)2) are promising electron acceptors for the bulk heterojuction (BHJ) organic solar cells (OSCs). However, previous production of C60(QM)2 often resulted in excessive regioisomers, which were difficult to purify and might consequently obscure the structure-performance study of the organofullerene acceptors. Herein, the electrosynthesis of C60(QM)2 is reported. The reaction exhibits a strong regiocontrol with generation of less regioisomers. Single regioisomers of cis-2, trans-3 and e C60(QM)2 are obtained, and the structures are solved with single crystal X-ray diffraction...
July 21, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28731343/-roller-wheel-pt-containing-small-molecules-and-the-impact-of-rollers-on-material-crystallinity-electronic-properties-and-solar-cell-performance
#7
Wenhan He, Maksim Y Livshits, Diane A Dickie, Zhen Zhang, Luis E Mejiaortega, Jeffrey J Rack, Qin Wu, Yang Qin
We report the synthesis, characterization and detailed comparison of a series of novel Pt-bisacetylide containing conjugated small molecules possessing an unconventional "roller-wheel" shaped structure that is distinctly different from the "dumbbell" designs in traditional Pt-bisacetylide containing conjugated polymers and small molecules. The relationship between the chemical nature and length of the "rollers" and the electronic and physical properties of the materials are carefully studied by steady state spectroscopy, cyclic voltammetry, differential scanning calorimetry, single-crystal X-ray diffraction, transient absorption spectroscopy, theoretical calculation and device application...
July 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28731327/donor-acceptor-properties-of-a-single-molecule-altered-by-on-surface-complex-formation
#8
Tobias Meier, Rémy Pawlak, Shigeki Kawai, Yan Geng, Xunshan Liu, Silvio Decurtins, Prokop Hapala, Alexis Baratoff, Shi-Xia Liu, Pavel Jelinek, Ernst Meyer, Thilo Glatzel
Electron donor-acceptor molecules are of outstanding interest in molecular electronics and organic solar cells for their intramolecular charge transfer controlled via electrical or optical excitation. The preservation of their electronic character in the ground state upon adsorption on a surface is cardinal for their implementation in such single-molecule devices. Here, we investigate by atomic force microscopy and scanning tunneling microscopy a prototypical system consisting of a π-conjugated tetrathiafulvalene-fused dipyridophenazine molecule adsorbed on thin NaCl films on Cu(111)...
July 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28731286/impact-of-fluorine-atoms-on-perylene-diimide-derivative-for-fullerene-free-organic-photovoltaics
#9
Liang Zhao, Hua Sun, Xiaoyuan Liu, Changmei Liu, Haiquan Shan, Jiuxu Xia, Zongxiang Xu, Fei Chen, Zhi-Kuan Chen, Wei Huang
The incorporation of fluorine atoms in organic semiconducting materials has attracted much attention recently due to its unique function to manipulate the molecular packing, film morphology and molecular energy levels. In this work, two perylenediimide (PDI) derivatives FPDI-CDTph and FPDI-CDTph2F were designed and synthesized to investigate the impact of fluorination on non-fullerene acceptors. Both FPDI-CDTph and FPDI-CDTph2F exhibited strong and broad absorption profiles, suitable lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy levels, and good electron transport ability...
June 14, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28727458/unraveling-the-high-voc-and-high-performance-of-integrated-perovskite-organic-bulk-heterojunction-solar-cells
#10
Shiqi Dong, Yongsheng Liu, Ziruo Hong, En-Ping Yao, Pengyu Sun, Lei Meng, Yuze Lin, Jinsong Huang, Gang Li, Yang Yang
We have demonstrated high performance integrated perovskite/bulk-heterojunction (BHJ) solar cells due to the low carrier recombination velocity, high open circuit voltage (Voc) and increased light absorption ability in near-infrared (NIR) region of integrated devices. In particular, we find that the Voc of the integrated devices is dominated by (or pinned to) the perovskite cells, not the OPV cells. A Quasi-Fermi Level Pinning Model was proposed to understand the working mechanism and the origin of the Voc of the integrated perovskite/BHJ solar cell, which following that of the perovskite solar cell and is much higher than that of the low bandgap polymer based organic BHJ solar cell...
July 20, 2017: Nano Letters
https://www.readbyqxmd.com/read/28726374/impact-of-thermal-annealing-on-organic-photovoltaic-cells-using-regioisomeric-donor-acceptor-acceptor-molecules
#11
Tao Zhang, Han Han, Yunlong Zou, Ying-Chi Lee, Hiroya Oshima, Ken-Tsung Wong, Russell J Holmes
We report a promising set of donor-acceptor-acceptor (D-A-A) electron-donor materials based on coplanar thieno[3,2-b]/[2,3-b]indole, benzo[c][1,2,5]thiadiazole, and dicyanovinylene, which are found to show broadband absorption with high extinction coefficients. The role of the regioisomeric electron-donating thienoindole moiety on the physical and structural properties is examined. Bulk heterojunction (BHJ) organic photovoltaic cells (OPVs) based on the thieno[2,3-b]indole-based electron donor NTU-2, using C70 as an electron acceptor, show a champion power conversion efficiency of 5...
July 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28714304/enhanced-thermochemical-stability-of-ch3nh3pbi3-perovskite-films-on-zinc-oxides-via-new-precursors-and-surface-engineering
#12
Fei Qin, Wei Meng, Jiacheng Fan, Chang Ge, Bangwu Luo, Ru Ge, Lin Hu, Fangyuan Jiang, Tiefeng Liu, Youyu Jiang, Yinhua Zhou
Hydroxyl groups on the surface of ZnO films lead to chemical decomposition of CH3NH3PbI3 perovskite films during thermal annealing, which limits the application of ZnO as a facile electron-transporting layer in perovskite solar cells. In this work, we report a new recipe that leads to substantially reduced hydroxyl groups on the surface of the resulting ZnO films by employing polyethylenimine (PEI) to replace generally-used ethanolamine in the precursor solutions. Films derived from the PEI-containing precursors are denoted as P-ZnO and those from the ethanoamine-containing precursors as E-ZnO...
July 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28714198/enhancing-performance-of-nonfullerene-acceptors-via-side-chain-conjugation-strategy
#13
Jiayu Wang, Wei Wang, Xiaohui Wang, Yang Wu, Qianqian Zhang, Cenqi Yan, Wei Ma, Wei You, Xiaowei Zhan
A side-chain conjugation strategy in the design of nonfullerene electron acceptors is proposed, with the design and synthesis of a side-chain-conjugated acceptor (ITIC2) based on a 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']di(cyclopenta-dithiophene) electron-donating core and 1,1-dicyanomethylene-3-indanone electron-withdrawing end groups. ITIC2 with the conjugated side chains exhibits an absorption peak at 714 nm, which redshifts 12 nm relative to ITIC1. The absorption extinction coefficient of ITIC2 is 2...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28708387/role-of-triplet-state-shelving-in-organic-photovoltaics-single-chain-aggregates-of-poly-3-hexylthiophene-versus-mesoscopic-multichain-aggregates
#14
Florian Steiner, John M Lupton, Jan Vogelsang
Triplet excitons have been the focus of considerable attention with regards to the functioning of polymer solar cells because these species are long-lived and quench subsequently generated singlet excitons in their vicinity. The role of triplets in poly(3-hexylthiophene) (P3HT) has been investigated extensively with contrary conclusions regarding their importance. We probe the various roles triplets can play in P3HT by analyzing the photoluminescence (PL) from isolated single-chain aggregates and multichain mesoscopic aggregates...
July 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28706263/the-influence-of-electrical-effects-on-device-performance-of-organic-solar-cells-with-nano-structured-electrodes
#15
Mina Mirsafaei, Amir Hossein Fallahpour, Paolo Lugli, Horst-Günter Rubahn, Jost Adam, Morten Madsen
Integration of light-trapping features and exploitation of metal nanostructure plasmonic effects are promising approaches for enhancing the power conversion efficiency of organic solar cells. These approaches' effects on the light absorption enhancement have been widely studied, especially in inorganic devices. While this light-trapping concept can be transferred to organic devices, one has to also consider nanostructure-induced electrical effects on the device performance, due to the fundamental difference in the organic semiconducting material properties compared to their inorganic counterparts...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28703944/low-dimensional-organic-inorganic-halide-perovskite-structure-properties-and-applications
#16
Ravi K Misra, Bat-El Cohen, Lior Iagher, Lioz Etgar
Three-dimensional (3D) perovskite has attracted a lot of attention due to its success in photovoltaic (PV) solar cells. However, one the major crucial issues lies in its stability, which has limited its commercialization. An important property of organic-inorganic perovskite is the possibility of forming a layered material using long organic cations that do not fit into the octahedral cage. The long organic cation acts as a "barrier" that "caps" the 3D perovskite forming the layered material. Controlling the number of perovskite layers could provide a confined structure with different chemical and physical properties than 3D perovskite has...
July 13, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28702561/vibronic-coupling-in-organic-semiconductors-for-photovoltaics
#17
Antonietta De Sio, Christoph Lienau
Light-induced charge transfer from the photoexcited donor to the acceptor is the fundamental step towards current generation in organic solar cells. Experimental evidence for efficient charge separation on ultrafast time scales has been available for quite some time. Yet even today, the elementary mechanisms underlying this process in organic semiconductors and in particular the role of the coherent wave-like motion of electrons and nuclei for the charge separation are still a matter of considerable debate...
July 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28700216/accelerated-lifetime-testing-of-organic-inorganic-perovskite-solar-cells-encapsulated-by-polyisobutylene
#18
Lei Shi, Trevor L Young, Jincheol Kim, Yun Sheng, Lei Wang, Yifeng Chen, Zhiqiang Feng, Mark J Keevers, Xiaojing Hao, Pierre J Verlinden, Martin A Green, Anita W Y Ho-Baillie
Metal halide perovskite solar cells (PSCs) have undergone rapid progress. However, unstable performance caused by sensitivity to environmental moisture and high temperature is a major impediment to commercialization of PSCs. In the present work, a low-temperature, glass-glass encapsulation technique using high performance polyisobutylene (PIB) as the moisture barrier is investigated on planar glass/FTO/TiO2/FAPbI3/PTAA/gold perovskite solar cells. PIB was applied as either an edge seal or blanket layer. Electrical connections to the encapsulated PSCs were provided by either the FTO or Au layers...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28700202/solution-processable-high-quality-graphene-for-organic-solar-cells
#19
Antonio Gaetano Ricciardulli, Sheng Yang, Xinliang Feng, Paul W M Blom
The unique optical and electronic properties of graphene open up new opportunities for optoelectronics. This work reports the use of solution-processed high-quality graphene as transparent conductive electrode in an organic solar cell using an electrochemical approach. The fabricated thieno[3,4-b]thiophene/benzodithiophene:phenyl-C71-butyric acid methyl ester (PTB7:PCB71M) bulk heterojunction organic solar cell based on the exfoliated graphene (EG) anode exhibits a power conversion efficiency of 4.23%, making EG promising for next-generation flexible optoelectronic devices...
July 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28696123/determining-the-true-optical-gap-in-a-high-performance-organic-photovoltaic-polymer-using-single-molecule-spectroscopy
#20
Gordon J Hedley, Florian Steiner, Jan Vogelsang, John M Lupton
Low-gap conjugated polymers have enabled an impressive increase in the efficiencies of organic solar cells, primarily due to their red absorption which allows harvesting of that part of the solar spectrum. Here, we report that the true optical gap of one prototypical material, PTB7, is in fact at significantly higher energy than has previously been reported, indicating that the red absorption utilized in these materials in solar cells is entirely due to chain aggregation. Using single-molecule spectroscopy we find that PL from isolated nanoscale aggregates consists of multiple independently emitting chromophores...
July 11, 2017: Journal of Physical Chemistry Letters
keyword
keyword
56467
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"