Iodide management in formamidinium-lead-halide–based perovskite layers for efficient solar cells
Woon Seok Yang,Byung-wook Park,Eui Hyuk Jung,Nam Joong Jeon,Young Chan Kim,Dong Uk Lee,Seong Sik Shin,Jangwon Seo,Eun Kyu Kim,Jun Hong Noh,Sang Il Seok +10 more
TLDR
The introduction of additional iodide ions into the organic cation solution, which is used to form the perovskite layers through an intramolecular exchanging process, decreases the concentration of deep-level defects, enabling the fabrication of PSCs with a certified power conversion efficiency.Abstract:
The formation of a dense and uniform thin layer on the substrates is crucial for the fabrication of high-performance perovskite solar cells (PSCs) containing formamidinium with multiple cations and mixed halide anions. The concentration of defect states, which reduce a cell’s performance by decreasing the open-circuit voltage and short-circuit current density, needs to be as low as possible. We show that the introduction of additional iodide ions into the organic cation solution, which are used to form the perovskite layers through an intramolecular exchanging process, decreases the concentration of deep-level defects. The defect-engineered thin perovskite layers enable the fabrication of PSCs with a certified power conversion efficiency of 22.1% in small cells and 19.7% in 1-square-centimeter cells.read more
Citations
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Surface passivation of perovskite film for efficient solar cells
Qi Jiang,Yang Zhao,Xingwang Zhang,Xiaolei Yang,Yong Chen,Zema Chu,Qiufeng Ye,Li Xingxing,Zhigang Yin,Jingbi You +9 more
TL;DR: In this paper, an organic halide salt phenethylammonium iodide (PEAI) was used on HC(NH2)2-CH3NH3 mixed perovskite films for surface defect passivation.
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Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent
Kebin Lin,Jun Xing,Li Na Quan,F. Pelayo García de Arquer,Xiwen Gong,Jianxun Lu,Liqiang Xie,Weijie Zhao,Di Zhang,Chuanzhong Yan,Wenqiang Li,Xinyi Liu,Yan Lu,Jeffrey Kirman,Edward H. Sargent,Qihua Xiong,Zhanhua Wei +16 more
TL;DR: In this article, the authors describe visible-light-emitting perovskite LEDs that surpass the quantum efficiency milestone of 20.3 per cent, which is achieved by a new strategy for managing the compositional distribution in the device.
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A fluorene-terminated hole-transporting material for highly efficient and stable perovskite solar cells
Nam Joong Jeon,Hyejin Na,Eui Hyuk Jung,Tae-Youl Yang,Yong Guk Lee,Geunjin Kim,Hee Won Shin,Sang Il Seok,Jaemin Lee,Jangwon Seo +9 more
TL;DR: Jeon et al. as discussed by the authors synthesize a fluorene-terminated hole-transporting material with a fine-tuned energy level and a high glass transition temperature to ensure highly efficient and thermally stable perovskite solar cells.
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References
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Journal ArticleDOI
Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells
TL;DR: A bilayer architecture comprising the key features of mesoscopic and planar structures obtained by a fully solution-based process is reported, providing important progress towards the understanding of the role of solution-processing in the realization of low-cost and highly efficient perovskite solar cells.
Journal ArticleDOI
High-performance photovoltaic perovskite layers fabricated through intramolecular exchange
Woon Seok Yang,Jun Hong Noh,Nam Joong Jeon,Young Chan Kim,Seungchan Ryu,Jangwon Seo,Sang Il Seok +6 more
TL;DR: An approach for depositing high-quality FAPbI3 films, involving FAP bI3 crystallization by the direct intramolecular exchange of dimethylsulfoxide (DMSO) molecules intercalated in PbI2 with formamidinium iodide is reported.
Journal ArticleDOI
Compositional engineering of perovskite materials for high-performance solar cells
Nam Joong Jeon,Jun Hong Noh,Woon Seok Yang,Young Chan Kim,Seungchan Ryu,Jangwon Seo,Sang Il Seok +6 more
TL;DR: This work combines the promising—but relatively unstable formamidinium lead iodide with FAPbI3 with methylammonium lead bromide as the light-harvesting unit in a bilayer solar-cell architecture and improves the power conversion efficiency of the solar cell to more than 18 per cent under a standard illumination.
Journal ArticleDOI
Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency
Michael Saliba,Taisuke Matsui,Ji-Youn Seo,Konrad Domanski,Juan-Pablo Correa-Baena,Mohammad Khaja Nazeeruddin,Shaik M. Zakeeruddin,Wolfgang Tress,Antonio Abate,Anders Hagfeldt,Michael Grätzel +10 more
TL;DR: In this paper, the triple cation perovskite photovoltaics with inorganic cesium were shown to be thermally more stable, contain less phase impurities and are less sensitive to processing conditions.
Journal ArticleDOI
Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells
Giles E. Eperon,Samuel D. Stranks,Christopher Menelaou,Michael B. Johnston,Laura M. Herz,Henry J. Snaith +5 more
TL;DR: In this article, the effect of replacing the methylammonium cation in this perovskite was explored, and it was shown that with the slightly larger formamidinium lead trihalide cation, one can synthesise a peroviscite with a bandgap tunable between 1.48 and 2.23 eV.