Details
| Original language | English |
|---|---|
| Article number | 2100529 |
| Number of pages | 10 |
| Journal | Advanced energy materials |
| Volume | 11 |
| Issue number | 20 |
| Publication status | Published - 27 May 2021 |
Abstract
The nonradiative recombination losses resulting from the trap states at the surface and grain boundaries directly hinder the further enhancement of power conversion efficiency (PCE) and stability of perovskite solar cells. Consequently, it is highly desirable to suppress nonradiative recombination through modulating perovskite crystallization and passivating the defects of perovskite films. Here, a simple and effective multifunctional additive engineering strategy is reported where 11 Maleimidoundecanoic acid (11MA) units with carbonyls (carboxyl and amide) and long hydrophobic alkyl chain are incorporated into a perovskite precursor solution. It is revealed that improved crystallinity, reduced trap state density, and inhibited ion migration are achieved, which is ascribed to the strong coordination interaction between the carbonyl groups at both sides of 11MA molecules and Pb2+. As a result, improved efficiency and stability are achieved simultaneously after introducing 11MA additive. The device with 11MA additive delivers a champion PCE of 23.34% with negligible hysteresis, which is significantly higher than the 18.24% of the control device. The modified device maintains around 91% of its initial PCE after aging under ambient conditions for 3000 h. This work provides a guide for developing multifunctional additive molecules for the purpose of simultaneous improvement of efficiency and stability.
Keywords
- additive, carbonyl, defect passivation, perovskite solar cells, stability
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- General Materials Science
Sustainable Development Goals
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In: Advanced energy materials, Vol. 11, No. 20, 2100529, 27.05.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Trap State Passivation by Rational Ligand Molecule Engineering toward Efficient and Stable Perovskite Solar Cells Exceeding 23% Efficiency
AU - Zhu, Lihua
AU - Zhang, Xian
AU - Li, Mengjia
AU - Shang, Xueni
AU - Lei, Kaixiang
AU - Zhang, Boxue
AU - Chen, Cong
AU - Zheng, Shijian
AU - Song, Hongwei
AU - Chen, Jiangzhao
N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 62004058, 21701041, 61674067, 52071048), Nature Science Foundation of Hebei Province (F2020202022), the Open Fund of the State Key Laboratory of Integrated Optoelectronics (IOSKL2020KF09), State Key Laboratory of Reliability and Intelligence of Electrical Equipment (No. EERI_PI20200005), this work was partially supported by the Fundamental Research Funds for the Central Universities (Grant Nos. 2020CDJQY‐A028, 2020CDJ‐LHZZ‐074). The authors would like to thank Prof. Kaisheng Ming, Dr. Bin Miao, Dr. Fucheng Wang, Dr. Huhu Su, Dr. Cuncun Wu for their help in HRTEM characterization and analysis.
PY - 2021/5/27
Y1 - 2021/5/27
N2 - The nonradiative recombination losses resulting from the trap states at the surface and grain boundaries directly hinder the further enhancement of power conversion efficiency (PCE) and stability of perovskite solar cells. Consequently, it is highly desirable to suppress nonradiative recombination through modulating perovskite crystallization and passivating the defects of perovskite films. Here, a simple and effective multifunctional additive engineering strategy is reported where 11 Maleimidoundecanoic acid (11MA) units with carbonyls (carboxyl and amide) and long hydrophobic alkyl chain are incorporated into a perovskite precursor solution. It is revealed that improved crystallinity, reduced trap state density, and inhibited ion migration are achieved, which is ascribed to the strong coordination interaction between the carbonyl groups at both sides of 11MA molecules and Pb2+. As a result, improved efficiency and stability are achieved simultaneously after introducing 11MA additive. The device with 11MA additive delivers a champion PCE of 23.34% with negligible hysteresis, which is significantly higher than the 18.24% of the control device. The modified device maintains around 91% of its initial PCE after aging under ambient conditions for 3000 h. This work provides a guide for developing multifunctional additive molecules for the purpose of simultaneous improvement of efficiency and stability.
AB - The nonradiative recombination losses resulting from the trap states at the surface and grain boundaries directly hinder the further enhancement of power conversion efficiency (PCE) and stability of perovskite solar cells. Consequently, it is highly desirable to suppress nonradiative recombination through modulating perovskite crystallization and passivating the defects of perovskite films. Here, a simple and effective multifunctional additive engineering strategy is reported where 11 Maleimidoundecanoic acid (11MA) units with carbonyls (carboxyl and amide) and long hydrophobic alkyl chain are incorporated into a perovskite precursor solution. It is revealed that improved crystallinity, reduced trap state density, and inhibited ion migration are achieved, which is ascribed to the strong coordination interaction between the carbonyl groups at both sides of 11MA molecules and Pb2+. As a result, improved efficiency and stability are achieved simultaneously after introducing 11MA additive. The device with 11MA additive delivers a champion PCE of 23.34% with negligible hysteresis, which is significantly higher than the 18.24% of the control device. The modified device maintains around 91% of its initial PCE after aging under ambient conditions for 3000 h. This work provides a guide for developing multifunctional additive molecules for the purpose of simultaneous improvement of efficiency and stability.
KW - additive
KW - carbonyl
KW - defect passivation
KW - perovskite solar cells
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=85104292123&partnerID=8YFLogxK
U2 - 10.1002/aenm.202100529
DO - 10.1002/aenm.202100529
M3 - Article
AN - SCOPUS:85104292123
VL - 11
JO - Advanced energy materials
JF - Advanced energy materials
SN - 1614-6832
IS - 20
M1 - 2100529
ER -