A Selective Targeting Anchor Strategy Affords Efficient and Stable Ideal-Bandgap Perovskite Solar Cells

Liang, Zheng1,2; Xu, Huifen1,2; Zhang, Yong3,4; Liu, Guozhen1; Chu, Shenglong2,5,6; Tao, Yuli1,2; Xu, Xiaoxiao1,2; Xu, Shendong1,2; Zhang, Liying1,2; Chen, Xiaojing1; Xu, Baomin3,4; Xiao, Zhengguo2,5,6; Pan, Xu1; Ye, Jiajiu1

2022-04-01

10.1002/adma.202110241

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Mixed lead-tin perovskite solar cells (LTPSCs) with an ideal bandgap are demonstrated as a promising candidate to reach higher power conversion efficiency (PCE) than their Pb-counterparts. Herein, a Br-free mixed lead-tin perovskite material, FA(0.8)MA(0.2)Pb(0.8)Sn(0.2)I(3), with a bandgap of 1.33 eV, as a perovskite absorber, is selected. Through density functional theory calculations and optoelectronic techniques, it is demonstrated that both Pb- and Sn-related A-site vacancies are pushed into deeper energetic depth, causing severe nonradiative recombination. Hence, a selective targeting anchor strategy that employs phenethylammonium iodide and ethylenediamine diiodide as co-modifiers to selectively anchor with Pb- and Sn-related active sites and passivate bimetallic traps, respectively, is established. Furthermore, the selectivity of the molecular oriented anchor passivation is demonstrated through energetic depth specificity of Pb- and Sn-related traps. As a result, a substantially enhanced open-circuit voltage (V-OC) from 0.79 to 0.90 V for the LTPSCs is achieved, yielding a champion PCE of 22.51%, which is the highest PCE among the reported ideal-bandgap PSCs. The V-OC loss is reduced to 0.43 V.

ideal bandgap mixed lead-tin perovskites open-circuit voltage loss perovskite solar cells trap passivation

SCI ; EI

英语

NI论文

其他

National Key R&D Program of China[2021YFB3800102] ; Science Funds of Distinguished Young Scholars of Anhui Province[2108085J34]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000777541700001

WILEY-V C H VERLAG GMBH

20221411885609

Density functional theory ; Energy gap ; Open circuit voltage ; Passivation ; Perovskite solar cells ; Timing circuits

Minerals:482.2 ; Protection Methods:539.2.1 ; Solar Cells:702.3 ; Pulse Circuits:713.4 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

MATERIALS SCIENCE

Web of Science

1.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
5.Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
6.Dept Phys, Hefei 230026, Anhui, Peoples R China

Liang, Zheng,Xu, Huifen,Zhang, Yong,et al. A Selective Targeting Anchor Strategy Affords Efficient and Stable Ideal-Bandgap Perovskite Solar Cells[J]. ADVANCED MATERIALS,2022,34.

Liang, Zheng.,Xu, Huifen.,Zhang, Yong.,Liu, Guozhen.,Chu, Shenglong.,...&Ye, Jiajiu.(2022).A Selective Targeting Anchor Strategy Affords Efficient and Stable Ideal-Bandgap Perovskite Solar Cells.ADVANCED MATERIALS,34.

Liang, Zheng,et al."A Selective Targeting Anchor Strategy Affords Efficient and Stable Ideal-Bandgap Perovskite Solar Cells".ADVANCED MATERIALS 34(2022).