High Fill Factor CsPbI_2Br Perovskite Solar Cells Via Crystallization Management

Min Ju Jeong; Soo Woong Jeon; Sung Yong KimJun Hong Noh

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High Fill Factor CsPbI_2Br Perovskite Solar Cells Via Crystallization Management

机译：High Fill Factor CsPbI_2Br Perovskite Solar Cells Via Crystallization Management

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Inorganic CsPbI_2Br perovskite has a substantial potential for triple-junctiontandem solar cells as a top subcell, however it exhibits relative instability inthe air compared with organic-inorganic perovskites as well as significantlylower efficiency than the theoretical efficiency limit. To further enhance theair-stability and efficiency of CsPbI_2Br-based perovskite solar cells (PSCs), it isvitally crucial to improve the crystallinity and passivate the defects withinfilms that accelerate the phase transformation to the photo-inactive phase inthe air. Here, it is reported that crystallization management via incorporatingsodium formate (NaFo) in a CsPbI_2Br perovskite solution effectively leads toenlarged grain size and the reduced trap density. The Na~+ cation and HOOC?anion produce a synergistic effect for engineering the defects by acting ascation and pseudo-halide anion passivators, respectively. As a result, theNaFo-incorporating device shows an improved power conversion efficiency(PCE) of 17.7% with a fill factor (FF) of 84.5%. To the best of the authors’knowledge, this progressive FF value is the highest value amongCsPbI_2Br-based PSCs reported thus far. In addition, the NaFo-incorporateddevice shows improved air stability compared to the control device, retainingover 95% of its initial PCE for 1000 hours under 10% relative humidity atroom temperature without any encapsulation.

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来源
《Advanced energy materials》 |2023年第23期|2300698.1-2300698.9|共9页
作者
Min Ju Jeong; Soo Woong Jeon; Sung Yong KimJun Hong Noh;
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作者单位

School of Civil, Environmental and Architectural EngineeringKorea UniversitySeoul 02841, Republic of Korea;

School of Civil, Environmental and Architectural EngineeringKorea UniversitySeoul 02841, Republic of Korea, KU-KIST Green School Graduate School of Energy and EnvironmentKorea UniversitySeoul 02841, Republic of Korea, Department of Integrative Energy Engi;

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正文语种英语
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CsPbI2Br; dopant-free; Fill factor; P3HT; stability;

High Fill Factor CsPbI_2Br Perovskite Solar Cells Via Crystallization Management

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