Chloride-Based Additive Engineering for Efficient and Stable Wide-Bandgap Perovskite Solar Cells

被引：45

作者：

Shen, Xinyi ^{[1
]}

Gallant, Benjamin M. ^{[1
]}

Holzhey, Philippe ^{[1
]}

Smith, Joel A. ^{[1
]}

Elmestekawy, Karim A. ^{[1
]}

Yuan, Zhongcheng ^{[1
]}

Rathnayake, P. V. G. M. ^{[2
]}

Bernardi, Stefano ^{[2
]}

Dasgupta, Akash ^{[1
]}

Kasparavicius, Ernestas ^{[3
]}

Malinauskas, Tadas ^{[4
]}

Caprioglio, Pietro ^{[1
]}

Shargaieva, Oleksandra ^{[5
]}

Lin, Yen-Hung ^{[1
]}

McCarthy, Melissa M. ^{[1
]}

Unger, Eva ^{[5
,6
]}

Getautis, Vytautas ^{[4
]}

Widmer-Cooper, Asaph ^{[2
,7
]}

Herz, Laura M. ^{[1
,8
]}

Snaith, Henry J. ^{[1
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

[2] Univ Sydney, ARC Ctr Excellence Exciton Sci, Sch Chem, Sydney, NSW 2006, Australia

[3] Ctr Phys Sci & Technol, Dept Mol Cpd Phys, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania

[4] Kaunas Univ Technol, Dept Organ Chem, LT-50254 Kaunas, Lithuania

[5] Helmholtz Zentrum Berlin Mat & Energie GmbH, Young Investigator Grp Hybrid Mat Format & Scalin, D-14109 Berlin, Germany

[6] Lund Univ, Chem Phys & NanoLund, Nat Vetarvagen 14, S-22362 Lund, Sweden

[7] Univ Sydney, Univ Sydney Nano Inst, Sydney, NSW 2006, Australia

[8] Tech Univ Munich, Inst Adv Study, Lichtenbergstr 2a, D-85748 Garching, Germany

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 30期

基金：

英国工程与自然科学研究理事会; 澳大利亚研究理事会;

关键词：

additive engineering; crystallization mechanism; halide homogenization; perovskite solar cells; suppressed halide segregation; CHARGE-CARRIER DYNAMICS; PHASE SEGREGATION; HALIDE PEROVSKITES; GROWTH; FILMS; TRANSFORMATION; FORMAMIDINIUM; PRECURSOR; TANDEM; LAYERS;

D O I：

10.1002/adma.202211742

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Metal halide perovskite based tandem solar cells are promising to achieve power conversion efficiency beyond the theoretical limit of their single-junction counterparts. However, overcoming the significant open-circuit voltage deficit present in wide-bandgap perovskite solar cells remains a major hurdle for realizing efficient and stable perovskite tandem cells. Here, a holistic approach to overcoming challenges in 1.8 eV perovskite solar cells is reported by engineering the perovskite crystallization pathway by means of chloride additives. In conjunction with employing a self-assembled monolayer as the hole-transport layer, an open-circuit voltage of 1.25 V and a power conversion efficiency of 17.0% are achieved. The key role of methylammonium chloride addition is elucidated in facilitating the growth of a chloride-rich intermediate phase that directs crystallization of the desired cubic perovskite phase and induces more effective halide homogenization. The as-formed 1.8 eV perovskite demonstrates suppressed halide segregation and improved optoelectronic properties.

引用

页数：11

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