Journal ArticleDOI
Enhanced performance via partial lead replacement with calcium for a CsPbI3 perovskite solar cell exceeding 13% power conversion efficiency
Cho Fai Jonathan Lau,Xiaofan Deng,Jianghui Zheng,Jincheol Kim,Zhilong Zhang,Meng Zhang,Jueming Bing,Benjamin Wilkinson,Long Hu,Robert Patterson,Shujuan Huang,Anita Ho-Baillie +11 more
TLDR
In this article, the authors partially replace Pb2+ with Ca2+ in the CsPbI3 precursor, producing multiple benefits, such as more uniform films with larger grains and better contact at the interface between the perovskite and the hole transport layer.Abstract:
Cesium metal halides are potential light-harvesting materials for use in the top cells of multi-junction devices due to their suitable bandgaps and good thermal stabilities. In particular, CsPbI3 has a bandgap of 1.7 eV, which is suitable for perovskite/Si tandem cells. However, the desirable black phase for CsPbI3 is not stable because Cs is too small to support the PbI6 octahedra. Also, there is room for improvement in terms of cell performance. Herein, we partially replace Pb2+ with Ca2+ in the CsPbI3 precursor, producing multiple benefits. Firstly, more uniform films with larger grains are produced from CsPbI3 with Ca2+, due to the reduction in the size of the colloids in the precursor solution with Ca2+. This morphology improvement provides better contact at the interface between the perovskite and the hole transport layer. In addition, it is found that the surface of the film is modified by the formation of a Ca rich oxide layer, providing a surface passivation effect. Finally, incorporation of Ca increases the band gap, leading to an increase in output voltage. The best CsPbI3 solar cell using 5% Ca2+ substitution in the precursor achieves a stabilised efficiency of 13.3%, and maintains 85% of its initial efficiency for over 2 months with encapsulation.read more
Citations
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Journal ArticleDOI
Halide Perovskite Photovoltaics: Background, Status, and Future Prospects
TL;DR: The fundamentals, recent research progress, present status, and views on future prospects of perovskite-based photovoltaics, with discussions focused on strategies to improve both intrinsic and extrinsic (environmental) stabilities of high-efficiency devices are described.
Journal ArticleDOI
Cubic or Orthorhombic? Revealing the Crystal Structure of Metastable Black-Phase CsPbI3 by Theory and Experiment
Rebecca J. Sutton,Marina R. Filip,Amir A. Haghighirad,Nobuya Sakai,Bernard Wenger,Feliciano Giustino,Feliciano Giustino,Henry J. Snaith +7 more
TL;DR: In this paper, a structural refinement of room-temperature black-phase CsPbI3 in an orthorhombic polymorph is presented, which is adopted by both powders and thin films of black- phase CsPsPbII3, fabricated either by high- or lowtemperature processes.
Journal ArticleDOI
All‐Inorganic CsPbX3 Perovskite Solar Cells: Progress and Prospects
TL;DR: This review aims to summarize the field up to now, propose solutions in terms of development bottlenecks, and attempt to boost further research in CsPbX3 PSCs.
Journal ArticleDOI
Recent progress of inorganic perovskite solar cells
Qidong Tai,Kai Chi Tang,Feng Yan +2 more
TL;DR: In this paper, the power conversion efficiency of organic-inorganic hybrid perovskite solar cells (PSCs) has been boosted to be comparable with that of commercial silicon solar cells.
Journal ArticleDOI
On the Current-Voltage Hysteresis in Perovskite Solar Cells: Dependence on Perovskite Composition and Methods to Remove Hysteresis
Dong-Ho Kang,Nam-Gyu Park +1 more
TL;DR: It is proposed from the current studies that engineering of perovskite film near the electron transporting layer and the hole transporting layer is of vital importance for achieving hysteresis-free PSCs and extremely high efficiency.
References
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Bandgap-tunable cesium lead halide perovskites with high thermal stability for efficient solar cells
Rebecca J. Sutton,Giles E. Eperon,Laura Miranda,Elizabeth S. Parrott,Brett A. Kamino,Jay B. Patel,Maximilian T. Hörantner,Michael B. Johnston,Amir A. Haghighirad,David T. Moore,Henry J. Snaith +10 more
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