High‐Efficiency Perovskite Quantum Dot Photovoltaic with Homogeneous Structure and Energy Landscape. (17th January 2023)

• Record Type: Journal Article
• Authors: Huang, Hehe; Zhang, Xuliang; Gui, Ruohua; Zhao, Chenyu; Guo, Junjun; Maung, Yin Maung; Yin, Hang; Ma, Wanli; Yuan, Jianyu
• Is Part Of: Advanced functional materials. Volume 33:Number 13(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-17
• Subjects: all‐inorganic CsPbI 3 perovskites -- electronic coupling energy disorders -- quantum dot solar cells; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202210728
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: The energy disorder originating from quantum dot (QD) size and relevant solid film inhomogeneity is detrimental to the charge transport and efficiency of QD based solar cells. The emergence of halide perovskite QDs (PQDs) have attracted great attention as promising absorbers in QD photovoltaics. However, it is currently difficult in preparing structural uniform PQD film with homogenous energetic landscape, which is essential for highly reproducible and efficient solar cells. Herein, assisted by a bidentate ligand 2, 5‐thiophenedicarboxylic acid, a facile solution phase anchoring (SPA) strategy is first reported for design and preparation of all‐inorganic CsPbI3 PQD film with reduced structure and energy disorder. The SPA can enhance PQD dispersion as well as dot‐to‐dot interaction, which is beneficial for fabricating high‐quality PQD arrays and photovoltaic devices. The engineered CsPbI3 PQD solar cell exhibits enhanced reproducibility, and higher open–circuit voltage together with a champion efficiency of 16.14%, which is among the highest report to date. These results are believed to provide design principle of uniform PQDs for high‐performance optoelectronic application. Abstract : Herein, a facile solution phase anchoring strategy is reported for the first time as a general approach to tune the dispersity of CsPbI3 perovskite quantum dots (QDs), which is exploited for reduced structure and energy disorder for fabricating high‐quality QD arrays and solar cell devices, leading to a high efficiency of 16.14% for CsPbI3 perovskite QD solar cell.