Triple-halide wide-bandgap perovskites tailored via facile organic halide treatment for high-performance perovskite/Cu(In,Ga)Se2 tandem solar cells

被引：3

作者：

Tran, Huyen ^{[1
,2
]}

Naqvi, Syed Dildar Haider ^{[1
,2
]}

Kim, Kihwan ^{[1
,2
]}

Lee, Ahreum ^{[1
]}

Oh, Seungju ^{[3
]}

Siddique, Yasir ^{[1
,2
]}

Ullah, Asmat ^{[1
,2
]}

Ali, Shah Syed Fawad ^{[1
,2
]}

Park, Minwoo ^{[3
]}

Hong, Sungjun ^{[1
,2
]}

Ahn, Sejin ^{[1
,2
]}

Gwak, Jihye ^{[1
,2
]}

Jeong, Inyoung ^{[1
]}

机构：

[1] Korea Inst Energy Res KIER, Photovolta Res Dept, Daejeon 34129, South Korea

[2] Univ Sci & Technol UST, Dept Renewable Energy Engn, Daejeon 34113, South Korea

[3] Sookmyung Womens Univ, Dept Chem & Biol Engn, Seoul 04310, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 476卷

基金：

新加坡国家研究基金会;

关键词：

Defect passivation; Perovskite solar cell; Copper indium gallium selenide; Tandem cell; CUBIC PHASE; EFFICIENT; FILMS; CH3NH3PBI3; TRIHALIDE;

D O I：

10.1016/j.cej.2023.146825

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Wide-bandgap (Eg) perovskites (PVSK) are important materials for realizing high-efficiency tandem devices that surpass the efficiency limit of single-junction solar cells. However, they suffer from phase separation and opencircuit voltage (Voc) loss. This study demonstrated a facile fabrication strategy of highly efficient and stable wideEg PVSKs through an organic halide surface treatment with formamidinium bromide to CH3NH3PbI3-xClx. The concurrent diffusion of organic cations and halide ions from the surface into bulk PVSK results in the complete conversion of the PVSK crystallinity to a cubic phase, eliminating segregated secondary phases and reducing unreacted PbI2. Br incorporation induces halide redistribution, resulting in the formation of triple-halide wide-Eg PVSK. The complete reconstruction of the bulk and surface of PVSK by surface post-treatment suppresses trapinduced nonradiative recombination and decreases the Urbach tail energy. Inverted PVSK solar cells based on the reconstructed PVSK exhibit enhanced photovoltaic performance with a low Voc deficit and high stability. In addition, we demonstrated a four-terminal (4-T) tandem device based on the triple-halide wide-Eg PVSK as a top cell combining with a Cu(In,Ga)Se2 bottom cell, achieving a power conversion efficiency of 24.5 %.

引用

页数：10

共 31 条

[31] New wide-bandgap D-A polymer based on pyrrolo [3,4-b] dithieno[2,3-f:3′,2′-h]quinoxalindione and thiazole functionalized benzo[1,2-b:4,5-b′] dithiophene units for high-performance ternary organic solar cells with over 16% efficiency
Keshtov, M. L.
Konstantinov, I. O.
Kuklin, S. A.
Davydova, N. K.
Alekseev, V. G.
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