Journal ArticleDOI
Cesium Doped NiOx as an Efficient Hole Extraction Layer for Inverted Planar Perovskite Solar Cells
TLDR
In this article, the impact of Cs dopant on the optoelectronic properties of NiOx and the photovoltaic performance has been investigated in inverted planar perovskite solar cells.Abstract:
Organic–inorganic hybrid perovskite solar cells have resulted in tremendous interest in developing next generation photovoltaics due to high record efficiency exceeding 22%. For inverted structure perovskite solar cells, the hole extraction layers play a significant role in achieving efficient and stable perovskite solar cell by modifying charge extraction, interfacial recombination losses, and band alignment. Here, cesium doped NiOx is selected as a hole extraction layer to study the impact of Cs dopant on the optoelectronic properties of NiOx and the photovoltaic performance. Cs doped NiOx films are prepared by a simple solution-based method. Both doped and undoped NiOx films are smooth and highly transparent, while the Cs doped NiOx exhibits better electron conductivity and higher work function. Therefore, Cs doping results in a significant improvement in the performance of NiOx-based inverted planar perovskite solar cells. The best efficiency of Cs doped NiOx devices is 19.35%, and those devices show high stability as well. The improved efficiency in devices with Cs:NiOx is attributed to a significant improvement in the hole extraction and better band alignment compared to undoped NiOx. This work reveals that Cs doped NiOx is very promising hole extraction material for high and stable inverted perovskite solar cells.read more
Citations
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Journal ArticleDOI
Enhanced photovoltage for inverted planar heterojunction perovskite solar cells
Deying Luo,Wenqiang Yang,Zhiping Wang,Aditya Sadhanala,Qin Hu,Rui Su,Ravichandran Shivanna,Gustavo F. Trindade,John F. Watts,Zhaojian Xu,Tanghao Liu,Ke Chen,Fengjun Ye,Pan Wu,Lichen Zhao,Jiang Wu,Yongguang Tu,Yifei Zhang,Xiao-Yu Yang,Wei Zhang,Richard H. Friend,Qihuang Gong,Qihuang Gong,Henry J. Snaith,Rui Zhu,Rui Zhu +25 more
TL;DR: This approach produces a wider bandgap top layer and a more n-type perovskite film, which mitigates nonradiative recombination, leading to an increase in Voc by up to 100 millivolts, which led to a stabilized power output approaching 21% at the maximum power point.
Journal ArticleDOI
Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells
Journal ArticleDOI
Defect and Contact Passivation for Perovskite Solar Cells.
TL;DR: The focus is on the origin of the various voltage-limiting mechanisms in PSCs, and the effect of such methods on the reduction of hysteresis are described.
Journal ArticleDOI
Causes and Solutions of Recombination in Perovskite Solar Cells
Jiangzhao Chen,Nam-Gyu Park +1 more
TL;DR: The focus herein is on the recombination at perovskite/electron-transporting material and perovSkite/hole-transport material interfaces in normal or inverted PSCs.
Journal ArticleDOI
Recent Progress on the Long-Term Stability of Perovskite Solar Cells.
TL;DR: This review is expected to provide helpful insights for further enhancing the stability of perovskite materials and PVSCs in this exciting field of thin film solar cell technology.
References
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Journal ArticleDOI
Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells
TL;DR: Two organolead halide perovskite nanocrystals were found to efficiently sensitize TiO(2) for visible-light conversion in photoelectrochemical cells, which exhibit strong band-gap absorptions as semiconductors.
Journal ArticleDOI
Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites
Michael M. Lee,Joël Teuscher,Tsutomu Miyasaka,Takurou N. Murakami,Takurou N. Murakami,Henry J. Snaith +5 more
TL;DR: A low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight is reported.
Journal ArticleDOI
Sequential deposition as a route to high-performance perovskite-sensitized solar cells
Julian Burschka,Norman Pellet,Norman Pellet,Soo-Jin Moon,Robin Humphry-Baker,Peng Gao,Mohammad Khaja Nazeeruddin,Michael Grätzel +7 more
TL;DR: A sequential deposition method for the formation of the perovskite pigment within the porous metal oxide film that greatly increases the reproducibility of their performance and allows the fabrication of solid-state mesoscopic solar cells with unprecedented power conversion efficiencies and high stability.
Journal ArticleDOI
Efficient planar heterojunction perovskite solar cells by vapour deposition
TL;DR: It is shown that perovskite absorbers can function at the highest efficiencies in simplified device architectures, without the need for complex nanostructures.
Journal ArticleDOI
Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3
Guichuan Xing,Nripan Mathews,Shuangyong Sun,Swee Sien Lim,Yeng Ming Lam,Michael Grätzel,Michael Grätzel,Subodh Mhaisalkar,Tze Chien Sum +8 more
TL;DR: Two studies show, using a variety of time-resolved absorption and emission spectroscopic techniques, that perovskite materials manifest relatively long diffusion paths for charge carriers energized by light absorption, highlighting effective carrier diffusion as a fruitful parameter for further optimization.