Controlled crystallization and surface engineering of mixed-halide y-CsPbI2Br inorganic perovskites via guanidinium iodide additive in air-processed perovskite solar cells

被引：14

作者：

Mali, Sawanta S. ^{[1
]}

Patil, Jyoti, V ^{[1
,2
]}

Steele, Julian A. ^{[3
,4
,5
]}

Jung, Young Hee ^{[6
]}

Nazeeruddin, Mohammad Khaja ^{[7
]}

Hong, Chang Kook ^{[1
]}

机构：

[1] Chonnam Natl Univ, Polymer Energy Mat Lab, Sch Chem Engn, Gwangju 61186, South Korea

[2] Chonnam Natl Univ, Optoelect Convergence Res Ctr, Sch Chem Engn, Gwangju 61186, South Korea

[3] Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia

[4] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[5] Katholieke Univ Leuven, Dept Microbial & Mol Syst, cMACS, B-3001 Leuven, Belgium

[6] Korea Testing & Res Inst KTR, Adv Chem Mat R&D Ctr, Gwangyang 57765, South Korea

[7] EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland

来源：

MATERIALS TODAY | 2023年 / 67卷

基金：

新加坡国家研究基金会; 澳大利亚研究理事会; 比利时弗兰德研究基金会;

关键词：

c-CsPbI2Br; Guanidinium organic cation additive; Grain size tuning; Passivation; Phase-stability; HIGHLY EFFICIENT; PHASE-STABILITY; PERFORMANCE; CSPBI2BR; PHOTOVOLTAICS; NANOCRYSTALS; TEMPERATURE; FILM;

D O I：

10.1016/j.mattod.2023.05.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this report, we demonstrate enlarged grain size (up to-3 lm) in ambient-stable black c-phase CsPbI2Br thin films through the regulated addition of guanidinium iodide (GAI) as an effective volatile additive. Nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) measure-ments indicate the complete sublimation of GAI following annealing, with no inclusion inside the final c-CsPbI2Br perovskite lattice. GAI is found to participate by retarding the cation-anion reaction via the Cs+ and GA+ cation-exchange process. We find that inorganic perovskite solar cells (IPSCs) devices made from (CsPbI2Br)0.925 + 0.075 GAI and a phenyltrimethylammonium chloride (PTACl) passivation retain a solar-friendly band-gap of 1.91 eV and excellent device performance, with the best open-circuit voltage reaching as high as 1.34 V, with highly reproducible and stable photo conversion efficiencies of 16.88% (for 0.09 cm2) and 15.60% (large area 1 cm2) under ambient conditions. Photostability analysis further demonstrated negligible efficiency loss over 1000 h under continuous one-sun equivalent illumination, indicating GAI additive as a promising approach toward ambient stable, all-inorganic high-efficiency solar cells.

引用

页码：33 / 45

页数：13