Abstract
Recent perovskite solar cell (PSC) advances have pursued strategies for reducing interfacial energetic mismatches to mitigate energy losses, as well as to minimize interfacial and bulk defects and ion vacancies to maximize charge transfer. Here nonconjugated multi-zwitterionic small-molecule electrolytes (NSEs) are introduced, which act not only as charge-extracting layers for barrier-free charge collection at planar triple cation PSC cathodes but also passivate charged defects at the perovskite bulk/interface via a spontaneous bottom-up passivation effect. Implementing these synergistic properties affords NSE-based planar PSCs that deliver a remarkable power conversion efficiency of 21.18% with a maximum VOC = 1.19 V, in combination with suppressed hysteresis and enhanced environmental, thermal, and light-soaking stability. Thus, this work demonstrates that the bottom-up, simultaneous interfacial and bulk trap passivation using NSE modifiers is a promising strategy to overcome outstanding issues impeding further PSC advances.
| Original language | English |
|---|---|
| Article number | 1903239 |
| Journal | Advanced Materials |
| DOIs | |
| Publication status | Accepted/In press - Jan 1 2019 |
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Keywords
- bottom-up passivation
- electron-transport layer
- perovskite solar cells
- zwitterions
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Simultaneous Bottom-Up Interfacial and Bulk Defect Passivation in Highly Efficient Planar Perovskite Solar Cells using Nonconjugated Small-Molecule Electrolytes. / Zheng, Ding; Peng, Ruixiang; Wang, Gang; Logsdon, Jenna Leigh; Wang, Binghao; Hu, Xiaobing; Chen, Yao; Dravid, Vinayak P.; Wasielewski, Michael R; Yu, Junsheng; Huang, Wei; Ge, Ziyi; Marks, Tobin J; Facchetti, Antonio.
In: Advanced Materials, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simultaneous Bottom-Up Interfacial and Bulk Defect Passivation in Highly Efficient Planar Perovskite Solar Cells using Nonconjugated Small-Molecule Electrolytes
AU - Zheng, Ding
AU - Peng, Ruixiang
AU - Wang, Gang
AU - Logsdon, Jenna Leigh
AU - Wang, Binghao
AU - Hu, Xiaobing
AU - Chen, Yao
AU - Dravid, Vinayak P.
AU - Wasielewski, Michael R
AU - Yu, Junsheng
AU - Huang, Wei
AU - Ge, Ziyi
AU - Marks, Tobin J
AU - Facchetti, Antonio
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Recent perovskite solar cell (PSC) advances have pursued strategies for reducing interfacial energetic mismatches to mitigate energy losses, as well as to minimize interfacial and bulk defects and ion vacancies to maximize charge transfer. Here nonconjugated multi-zwitterionic small-molecule electrolytes (NSEs) are introduced, which act not only as charge-extracting layers for barrier-free charge collection at planar triple cation PSC cathodes but also passivate charged defects at the perovskite bulk/interface via a spontaneous bottom-up passivation effect. Implementing these synergistic properties affords NSE-based planar PSCs that deliver a remarkable power conversion efficiency of 21.18% with a maximum VOC = 1.19 V, in combination with suppressed hysteresis and enhanced environmental, thermal, and light-soaking stability. Thus, this work demonstrates that the bottom-up, simultaneous interfacial and bulk trap passivation using NSE modifiers is a promising strategy to overcome outstanding issues impeding further PSC advances.
AB - Recent perovskite solar cell (PSC) advances have pursued strategies for reducing interfacial energetic mismatches to mitigate energy losses, as well as to minimize interfacial and bulk defects and ion vacancies to maximize charge transfer. Here nonconjugated multi-zwitterionic small-molecule electrolytes (NSEs) are introduced, which act not only as charge-extracting layers for barrier-free charge collection at planar triple cation PSC cathodes but also passivate charged defects at the perovskite bulk/interface via a spontaneous bottom-up passivation effect. Implementing these synergistic properties affords NSE-based planar PSCs that deliver a remarkable power conversion efficiency of 21.18% with a maximum VOC = 1.19 V, in combination with suppressed hysteresis and enhanced environmental, thermal, and light-soaking stability. Thus, this work demonstrates that the bottom-up, simultaneous interfacial and bulk trap passivation using NSE modifiers is a promising strategy to overcome outstanding issues impeding further PSC advances.
KW - bottom-up passivation
KW - electron-transport layer
KW - perovskite solar cells
KW - zwitterions
UR - http://www.scopus.com/inward/record.url?scp=85070738017&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070738017&partnerID=8YFLogxK
U2 - 10.1002/adma.201903239
DO - 10.1002/adma.201903239
M3 - Article
C2 - 31402528
AN - SCOPUS:85070738017
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
M1 - 1903239
ER -