Highly Efficient and Stable Inverted Perovskite Solar Cell Using Pure δ-FAPbI 3 Single Crystals.

Autor: Mandal TN; Functional Crystallization Center, Department of Chemical Engineering (Integrated Engineering), Kyung Hee University, Yongin, Gyeonggi-do, 17104, Republic of Korea., Heo JH; Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea., Im SH; Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea., Kim WS; Functional Crystallization Center, Department of Chemical Engineering (Integrated Engineering), Kyung Hee University, Yongin, Gyeonggi-do, 17104, Republic of Korea.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2023 Dec; Vol. 19 (52), pp. e2305246. Date of Electronic Publication: 2023 Aug 27.
DOI: 10.1002/smll.202305246
Abstrakt: Pure δ-formamidinium lead triiodide (δ-FAPbI 3 ) single crystal for highly efficient perovskite solar cell (PCS) with long-term stability is prepared by a new method consisting of liquid phase reaction of FAI and PbI 2 in N,N-dimethyl formamide and antisolvent crystallization using acetonitrile. In this method, the incorporation of any impurity into the crystal is excluded by the molecular recognition of the crystal growth site. This pure crystal is used to fabricate α-FAPbI 3 inverted PSCs which showed excellent power conversion efficiency (PCE) due to much-reduced trap-states. The champion device exhibited a high PCE of 23.48% under the 1-Sun condition. Surface-treated devices with 3-(aminomethyl)pyridine showed a significantly improved PCE of 25.07%. In addition, the unencapsulated device maintained 97.22% of its initial efficiency under continuous 1-Sun illumination for 1,000 h at 85 °C in an N 2 atmosphere ensuring long-term thermal and photo stabilities of PSCs, whereas the control device kept only 89.93%.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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