TY - JOUR
T1 - Mitigating Defect States of All-Inorganic CsPbI2Br Perovskite via Multifunctional 2-Amino-5-Nitrothiazole Additive for an Efficient Air-Processed Outdoor/Indoor Photovoltaics
AU - Bahadur, Jitendra
AU - Cho, Sung Won
AU - Pandey, Padmini
AU - Yoon, Saemon
AU - Lee, Dong Gun
AU - Ryu, Jun
AU - Song, Jun Tae
AU - Lim, Jongchul
AU - Kang, Dong Won
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024/3
Y1 - 2024/3
N2 - All-inorganic CsPbI2Br mixed halide perovskites show promise as wide-bandgap photoabsorbers in photovoltaics. However, the rapid crystal growth observed in solution-processed CsPbI2Br often leads to morphologies plagued by pinholes and defects, which limit device performance. This study introduces 2-Amino-5-nitrothiazole (ANT), an innovative precursor additive, to enhance film quality. ANT's selective interactions with the perovskite precursor moderate the crystal growth, resulting in a dense, flawless CsPbI2Br film characterized by superior crystallinity and coverage. Furthermore, the -NH2 group in ANT coordinates with Pb octahedra, effectively mitigating charge defects through NH=I/Br bonds. Simultaneously, S=C-N sites interact with uncoordinated Pb2+ ions, reducing defect states and nonradiative recombination. This innovation achieves an impressive device efficiency of 17.13% with a fill factor (FF) of 83.41%, surpassing the control's efficiency of 15.21% (FF of 80.45%). Notably, the champion device maintains an efficiency of 29.47% under indoor light-emitting diode lighting at 1000 lux. Additionally, the optimized perovskite solar cell demonstrates remarkable stability, retaining ≈90% of its efficiency for over 720 h at 85 °C in air, even without encapsulation.
AB - All-inorganic CsPbI2Br mixed halide perovskites show promise as wide-bandgap photoabsorbers in photovoltaics. However, the rapid crystal growth observed in solution-processed CsPbI2Br often leads to morphologies plagued by pinholes and defects, which limit device performance. This study introduces 2-Amino-5-nitrothiazole (ANT), an innovative precursor additive, to enhance film quality. ANT's selective interactions with the perovskite precursor moderate the crystal growth, resulting in a dense, flawless CsPbI2Br film characterized by superior crystallinity and coverage. Furthermore, the -NH2 group in ANT coordinates with Pb octahedra, effectively mitigating charge defects through NH=I/Br bonds. Simultaneously, S=C-N sites interact with uncoordinated Pb2+ ions, reducing defect states and nonradiative recombination. This innovation achieves an impressive device efficiency of 17.13% with a fill factor (FF) of 83.41%, surpassing the control's efficiency of 15.21% (FF of 80.45%). Notably, the champion device maintains an efficiency of 29.47% under indoor light-emitting diode lighting at 1000 lux. Additionally, the optimized perovskite solar cell demonstrates remarkable stability, retaining ≈90% of its efficiency for over 720 h at 85 °C in air, even without encapsulation.
KW - 2-Amino-5-nitrothiazole
KW - additives
KW - all-inorganic perovskites
KW - outdoor/indoor perovskite solar cells
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U2 - 10.1002/solr.202300912
DO - 10.1002/solr.202300912
M3 - Article
AN - SCOPUS:85182673205
SN - 2367-198X
VL - 8
JO - Solar RRL
JF - Solar RRL
IS - 5
M1 - 2300912
ER -