Managing grains and interfaces via ligand anchoring enables 22.3%-efficiency inverted perovskite solar cells

被引：1076

作者：

Zheng, Xiaopeng ^{[1
]}

Hou, Yi ^{[2
]}

Bao, Chunxiong ^{[3
]}

Yin, Jun ^{[1
]}

Yuan, Fanglong ^{[2
,4
]}

Huang, Ziru ^{[2
]}

Song, Kepeng ^{[1
]}

Liu, Jiakai ^{[1
]}

Troughton, Joel ^{[1
]}

Gasparini, Nicola ^{[1
]}

Zhou, Chun ^{[2
]}

Lin, Yuanbao ^{[1
]}

Xue, Ding-Jiang ^{[2
]}

Chen, Bin ^{[2
]}

Johnston, Andrew K. ^{[2
]}

Wei, Nini ^{[5
]}

Hedhili, Mohamed Nejib ^{[5
]}

Wei, Mingyang ^{[2
]}

Alsalloum, Abdullah Y. ^{[1
]}

Maity, Partha ^{[1
]}

Turedi, Bekir ^{[1
]}

Yang, Chen ^{[1
]}

Baran, Derya ^{[1
]}

Anthopoulos, Thomas D. ^{[1
]}

Han, Yu ^{[1
]}

Lu, Zheng-Hong ^{[4
]}

Mohammed, Omar F. ^{[1
]}

Gao, Feng ^{[3
]}

Sargent, Edward H. ^{[2
]}

Bakr, Osman M. ^{[1
]}

机构：

[1] KAUST, Div Phys Sci & Engn, Thuwal, Saudi Arabia

[2] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON, Canada

[3] Linkoping Univ, Dept Phys Chem & Biol IFM, Linkoping, Sweden

[4] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON, Canada

[5] KAUST, Imaging & Characterizat Core Lab, Thuwal, Saudi Arabia

来源：

NATURE ENERGY | 2020年 / 5卷 / 02期

关键词：

SUPPRESSED ION MIGRATION; EFFICIENT; SURFACE; STABILITY; LIFETIMES; CRYSTALS; DYNAMICS; CATION; FILMS;

D O I：

10.1038/s41560-019-0538-4

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Inverted perovskite solar cells have attracted increasing attention because they have achieved long operating lifetimes. However, they have exhibited significantly inferior power conversion efficiencies compared to regular perovskite solar cells. Here we reduce this efficiency gap using a trace amount of surface-anchoring alkylamine ligands (AALs) with different chain lengths as grain and interface modifiers. We show that long-chain AALs added to the precursor solution suppress nonradiative carrier recombination and improve the optoelectronic properties of mixed-cation mixed-halide perovskite films. The resulting AAL surface-modified films exhibit a prominent (100) orientation and lower trap-state density as well as enhanced carrier mobilities and diffusion lengths. These translate into a certified stabilized power conversion efficiency of 22.3% (23.0% power conversion efficiency for lab-measured champion devices). The devices operate for over 1,000 h at the maximum power point under simulated AM1.5 illumination, without loss of efficiency. While perovskite solar cells with an inverted architecture hold great promise for operation stability, their power conversion efficiency lags behind that of conventional cells. Here, Zheng et al. achieve a certified 22.34% efficiency, exploiting alkylamine ligands as grain and interface modifiers.

引用

页码：131 / 140

页数：10

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