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perovskite solar cell

Daniel Ramirez, Yusaku Suto, Nataly Carolina Rosero-Navarro, Akira Miura, Kiyoharu Tadanaga, Franklin Jaramillo
Organic-inorganic hybrid perovskite materials have recently been investigated in a variety of applications, including solar cells, light emitting devices (LEDs), and lasers because of their impressive semiconductor properties. Nevertheless, the perovskite structure has the ability to host extrinsic elements, making its application in the battery field possible. During the present study, we fabricated and investigated the electrochemical properties of three-dimensional (3D) methylammonium lead mixed-halide CH3 NH3 PbI3- x Brx and two-dimensional (2D) propylammonium-methlylammonium lead bromide (CH3 NH3 )2 (CH3 (CH2 )2 NH3 )2 Pb3 Br10 hybrid perovskite thin films as electrode materials for Li-ion batteries...
March 21, 2018: Inorganic Chemistry
Johannes Schlipf, Abdelrahman M Askar, Florian Pantle, Benjamin D Wiltshire, Anton Sura, Peter Schneider, Linus Huber, Karthik Shankar, Peter Müller-Buschbaum
Solar cells employing hybrid perovskites have proven to be a serious contender versus established thin-film photovoltaic technologies. Typically, current photovoltaic devices are built up layer by layer from a transparent substrate (bottom-up approach), while the deposition of the perovskite layer itself comes with many challenges including the control of crystal size, nucleation density and growth rate. On the other hand, single crystals have been used with great success for studying the fundamental properties of this new class of optoelectronic materials...
March 20, 2018: Scientific Reports
Chengbo Tian, Shujing Zhang, Anyi Mei, Yaoguang Rong, Yue Hu, Kai Du, Miao Duan, Yusong Sheng, Pei Jiang, Gengzhao Xu, Hongwei Han
The printable mesoscopic perovskite solar cells (PMPSCs) have exhibited great attracting prospects in the energy conversion field due to their high stability and potential scalability. However, the thick perovskite film in the mesoporous layers challenge the charge transportation and increase grain boundary defects, limiting the performance of the PMPSCs. It is critical not only to improve the electric property of the perovskite film but also to passivate the charge traps to improve the device performance. Herein we synthesized a bis-adduct 2, 5-(Dimethyl ester) C60 fulleropyrrolidine (bis-DMEC60 ) via rational molecular design and incorporated it into the PMPSCs...
March 20, 2018: ACS Applied Materials & Interfaces
Yohan Ko, Yechan Kim, Chanyong Lee, Youbin Kim, Yongseok Jun
Organometallic halide perovskite solar cells (PSCs) have unique photovoltaic properties for use in next-generation solar-energy harvesting systems. The highest efficiency PSCs reached 22.1% at a lab scale of <0.1 cm2 device area. Thus, scaling up is the next step toward commercialization, but the difficulty in controlling the quality of large-area perovskite thin films remains a fundamental challenge. It has also been frequently reported that the J-V hysteresis is intensified in PSCs with areas larger than 1 cm2 ...
March 20, 2018: ACS Applied Materials & Interfaces
Núria F Montcada, Maria Méndez, Kyung Taek Cho, Mohammad Khaja Nazeeruddin, Emilio Palomares
We describe in this work how the use of the photo-induced charge extraction (PICE) technique can be useful to study and understand the relationship between perovskite composition, ion migration processes and solar cell performance. Our results show that varying the organic cation and halide composition in perovskite crystals has an effect on the charge extraction process, which is related to the differences in the ion migration process occurring during light irradiation. Moreover, we do also observe that different perovskites also show differences in interfacial carrier recombination kinetics under operando conditions but the dynamics are too fast to be influenced by the ion migration...
March 20, 2018: Nanoscale
Yen-Chen Shih, Leeyih Wang, Hsiao-Chi Hsieh, King-Fu Lin
Ion accumulation of organometal halide perovskite (OHP) induced by electrode polarization of perovskite solar cells (PSCs) under illumination has been intensely studied and associated with widely observed current-voltage hysteresis behavior. This work dedicates to the investigation of charged species' behavior at the compact TiO2/OHP interface with respect to electrode polarization in PSC devices. By providing a comprehensive discussion of open-circuit voltage (VOC) buildup and VOC decay under illumination and in the dark for the PSCs modified with [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) at the TiO2/OHP interface and their corresponding electrochemical impedance spectroscopies (EIS), a justified mechanism is proposed attempting to elucidate the dynamics of interfacial species with respect to the time and frequency domains...
March 20, 2018: ACS Applied Materials & Interfaces
Meltem Aygüler, Alexander Georg Hufnagel, Philipp Rieder, Michael Wussler, Wolfram Jaegermann, Thomas Bein, Vladimir Dyakonov, Michiel L Petrus, Andreas Baumann, Pablo Docampo
We tune the Fermi level alignment between the SnOX electron transport layer (ETL) and Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3 and highlight that this parameter is interlinked with current-voltage hysteresis in perovskite solar cells (PSCs). Furthermore, thermally stimulated current measurements reveal that the depth of trap states in the ETL or at the ETL-perovskite interface correlates with Fermi level positions, ultimately linking it to the energy difference between the Fermi level and conduction band minimum...
March 20, 2018: ACS Applied Materials & Interfaces
Jesus Idigoras, Francisco Javier Aparicio, Lidia Contreras-Bernal, Susana Ramos-Terrón, María Alcaire, Juan R Sanchez-Valencia, Ana Borras, Angel Barranco, Juan Antonio Anta
A compromise between high power conversion efficiency and long-term stability of hybrid organic-inorganic metal halide perovskite solar cells is necessary for their outdoor photovoltaic application and commercialization. Herein, a method to improve the stability of perovskite solar cells under water and moisture exposure consisting in the encapsulation of the cell with an ultrathin plasma polymer is reported. The deposition of the polymer is carried out at room temperature by the remote plasma vacuum deposition of adamantane powder...
March 19, 2018: ACS Applied Materials & Interfaces
Garam Park, In-Hwan Oh, J M Sungil Park, Jinyong Jung, Chun-Yeol You, June-Seo Kim, Yonghwan Kim, Jong Hoon Jung, Namjung Hur, Younghak Kim, J-Y Kim, Chang Seop Hong, Ki-Yeon Kim
Two dimensional layered organic-inorganic halide perovskites offer a wide variety of novel functionality such as solar cell and optoelectronics and magnetism. Self-assembly of these materials using solution process (ex. spin coating) makes crystalline thin films synthesized at ambient environment. However, flexibility of organic layer also poses a structure stability issue in perovskite thin films against environment factors (ex. moisture). In this study, we investigate the effect of solvents and moisture on structure and property in the (C6 H5 (CH2 )2 NH3 )2 (Cu, Mn)Cl4 (Cu-PEA, Mn-PEA) perovskite thin films spin-coated on Si wafer using three solvents (H2 O, MeOH, MeOH + H2 O)...
March 16, 2018: Scientific Reports
Ahmed Mourtada Elseman, Ahmed Esmail Shalan, Sajid Sajid, Mohamed Mohamed Rashad, Ali Mostafa Hassan, Meicheng Li
Toxicity as well as chemical instability issues of halide perovskites based on organic-inorganic lead-containing materials still remains the main drawbacks for perovskite solar cells (PSCs). Herein, we discuss the preparation of copper (Cu)-based hybrid materials, where we replace lead (Pb) with non-toxic Cu metal for lead free perovskite solar cells; investigate of its potential towards solar cells applications based on experimental and theoretical studies. The formation of (CH3NH3)2CuX4 [(CH3NH3)2CuCl4, (CH3NH3)2CuCl2I2, and (CH3NH3)2CuCl2Br2] were discussed in details...
March 16, 2018: ACS Applied Materials & Interfaces
Cristina Rodríguez-Seco, Lydia Cabau, Anton Vidal-Ferran, Emilio Palomares
Over hundreds of new organic semiconductor molecules have been synthesized as hole transport materials (HTMs) for perovskite solar cells. However, to date, the well-known N2 , N2 , N2' , N2' , N7 , N7 , N7' , octakis-(4-methoxyphenyl)-9,9-spirobi-[9,9'-spirobi[9 H-fluorene]-2,2',7,7'-tetramine (spiro-OMeTAD) is still the best choice for the best perovskite device performance. Nevertheless, there is a consensus that spiro-OMeTAD by itself is not stable enough for long-term stable devices, and its market price makes its use in large-scale production costly...
March 15, 2018: Accounts of Chemical Research
Juan Zhao, Zhihe Chi, Zhan Yang, Xiaojie Chen, Michael S Arnold, Yi Zhang, Jiarui Xu, Zhenguo Chi, Matthew P Aldred
Truly stretchable electronics, wherein all components themselves permit elastic deformation as the whole devices are stretched, exhibit unique advantages over other strategies, such as simple fabrication process, high integrity of entire components and intimate integration with curvilinear surfaces. In contrast to the stretchable devices using stretchable interconnectors to integrate with rigid active devices, truly stretchable devices are realized with or without intentionally employing structural engineering (e...
March 15, 2018: Nanoscale
Qinjun Sun, Shaolong Zhou, Xiaolei Shi, Xiaochun Wang, Liyan Gao, Zhanfeng Li, Yuying Hao
CuO nanowires (NWs) with the diameters ranging from 130 to 275 nm have been successfully prepared by electrospinning and calcination technique, followed by a calcination process. Inverted planar heterojunction perovskite solar cells (PSCs) with the structure of ITO/CuO NWs/PEDOT:PSS/CH3NH3PbI3/PCBM/Bphen/Ag were designed, achieving a best power conversion efficiency (PCE) of 16.87% , which is 21% improvement compared with that of the control PSCs without CuO NWs. By the characterizations of optical microscope, X-ray diffraction (XRD) and scanning electron microscopy (SEM), it is found that CuO NWs have uniform morphology and orderly arrangement...
March 15, 2018: ACS Applied Materials & Interfaces
Bo Li, Yanan Zhang, Lin Fu, Tong Yu, Shujie Zhou, Luyuan Zhang, Longwei Yin
Owing to inevitable thermal/moisture instability for organic-inorganic hybrid perovskites, pure inorganic perovskite cesium lead halides with both inherent stability and prominent photovoltaic performance have become research hotspots as a promising candidate for commercial perovskite solar cells. However, it is still a serious challenge to synthesize desired cubic cesium lead iodides (CsPbI3 ) with superior photovoltaic performance for its thermodynamically metastable characteristics. Herein, polymer poly-vinylpyrrolidone (PVP)-induced surface passivation engineering is reported to synthesize extra-long-term stable cubic CsPbI3 ...
March 14, 2018: Nature Communications
Zhao Xiaojuan, Leiming Tao, Hao Li, Wenchao Huang, Pengyu Sun, Jun Liu, Shuangshuang Liu, Qiang Sun, Zhifang Cui, Lijie Sun, Yan Shen, Yang Yang, Mingkui Wang
Organic-inorganic hybrid lead halide perovskites have been widely investigated in optoelectronics both experimentally and theoretically. The present work incorporates chemical modified graphene into nanocrystal SnO2 as electron transporting layer (ETL) for highly efficient planar perovskite solar cells. The modification of SnO2 with highly conductive two-dimensional naphthalene diimide-graphene can increase surface hydrophobicity and form van der Waals interaction between the surfactant and the organic-inorganic hybrid lead halide perovskite compounds...
March 14, 2018: Nano Letters
Luis M Pazos Outón, T Patrick Xiao, Eli Yablonovitch
Lead halide materials have seen a recent surge of interest from the photovoltaics community following the observation of surprisingly high photovoltaic performance, with opto-electronic properties similar to GaAs. This begs the question; what is the limit for the efficiency of these materials? It has been known that at 1-sun the efficiency limit of crystalline silicon is ~29%, despite the Shockley-Queisser (SQ) limit for its bandgap being ~33%, the discrepancy being due to strong Auger recombination. In this article, we show that Methyl Ammonium Lead Iodide (MAPbI3) likewise has a larger than expected Auger coefficient...
March 14, 2018: Journal of Physical Chemistry Letters
Nozomi Ito, Muhammad Akmal Kamarudin, Yaohong Zhang, Daisuke Hirotani, Qing Shen, Yuhei Ogomi, Satoshi Iikubo, Takashi Minemoto, Kenji Yoshino, Shuzi Hayase
Lead-based solar cells have gained ground in recent years, showing efficiency as high as 20 % which is on par with silicon solar cells. However, the toxicity of lead makes it non ideal candidate in solar cells. Alternatively, tin-based perovskites have been proposed due to their non-toxic nature and abundance in nature. Unfortunately, these solar cells suffer from low efficiency and stability. Here, we propose a new type of perovskite material based on mixed tin and germanium. The material showed a band gap around 1...
March 14, 2018: Journal of Physical Chemistry Letters
Il Jeon, Hiroshi Ueno, Seungju Seo, Kerttu Aitola, Ryosuke Nishikubo, Akinori Saeki, Hiroshi Okada, Gerrit Boschloo, Shigeo Maruyama, Yutaka Matsuo
Herein, we report use of [Li+ @C60 ]TFSI- as a dopant for spiro-MeOTAD in lead halide perovskite solar cells. This approach gave an air stability nearly 10-fold that of conventional devices using Li+ TFSI- . Such high stability is attributed to the hydrophobic nature of [Li+ @C60 ]TFSI- repelling moisture and absorbing intruding oxygen, thereby protecting the perovskite device from degradation. Furthermore, [Li+ @C60 ]TFSI- could oxidize spiro-MeOTAD without the need for oxygen. The encapsulated devices exhibited outstanding air stability for more than 1000 h while illuminated under ambient conditions...
March 13, 2018: Angewandte Chemie
Yao Liu, Zachariah A Page, Dongming Zhou, Volodimyr V Duzhko, Kevin R Kittilstved, Todd Emrick, Thomas P Russell
While perovskite solar cells have invigorated the photovoltaic research community due to their excellent power conversion efficiencies (PCEs), these devices notably suffer from poor stability. To address this crucial issue, a solution-processable organic chemical inhibition layer (OCIL) was integrated into perovskite solar cells, resulting in improved device stability and a maximum PCE of 16.3%. Photoenhanced self-doping of the fulleropyrrolidine mixture in the interlayers afforded devices that were advantageously insensitive to OCIL thickness, ranging from 4 to 190 nm...
February 28, 2018: ACS Central Science
Mohammad Mahdi Tavakoli, Fabrizio Giordano, Shaik M Zakeeruddin, Michael Grätzel
The solar to electric power conversion efficiency (PCE) of perovskite solar cells (PSCs) has recently reached 22.7 % exceeding that of competing thin film photovoltaics and the market leader polycrystalline silicon. Further augmentation of the PCE towards the Shockley-Queisser limit of 33.5 % warrants suppression of radiationless carrier recombination by judicious engineering of the interface between the light harvesting perovskite and the charge carrier extraction layers. Here, we introduce a mesoscopic oxide double layer as electron selective contact consisting of a scaffold of TiO2 nanoparticles covered by a thin film of SnO2, either in amorphous (a-SnO2), crystalline (c-SnO2) or nanocrystalline (quantum dot) form (SnO2-NC)...
March 12, 2018: Nano Letters
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