Modulate Molecular Interaction between Hole Extraction Polymers and Lead Ions toward Hysteresis-Free and Efficient Perovskite Solar Cells
Abstract
Herein three polymeric hole extraction materials (HEMs), poly(benzene‐dithiophene) (PB2T)‐O, PB2T‐S, and PB2T‐SO are presented for p–i–n perovskite solar cells (PVSCs). This study reveals that the perovskite device hysteresis and performance heavily rely on the perovskite grain boundary conditions. More specifically, they are predetermined through the molecular interaction between Lewis base atoms of HEMs and perovskites. It is revealed that only changing the side chain terminals (-OCH_3, -SCH_3, and –SOCH_3) of HEMs results in effective modulating PVSC performance and hysteresis, due to the effective tune of interaction strength between HEM and perovskite. With an in situ grown perovskite‐HEM bulk heterojunction structure, PB2T‐O with weak binding group (-OCH_3, −78.9 kcal mol^(−1) bonding energy) to lead ions allows delivering hysteresis‐free and efficient devices, which is sharp contrast to the strong binding PB2T‐SO (−119.3 kcal mol^(−1) bonding energy). Overall, this work provides new insights on PVSC hysteresis and the related curing methods via multifunctional HEM design in PVSCs.
Additional Information
© 2018 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. Issue Online: 09 August 2018; Version of Record online: 05 June 2018; Manuscript revised: 19 March 2018; Manuscript received: 18 January 2018. Funding Information: National Natural Science Foundation of China. Grant Numbers: 21674093, 51620105006, 21503203, 51473142 973 program. Grant Number: 2014CB643503. International Science and Technology Cooperation Program of China. Grant Number: 2016YFE0102900. National Key R&D program of China. Grant Number: 2017YFA0403403. Zhejiang Province Science and Technology Plan. Grant Number: 2018C01047. Zhejiang Natural Science Fund for Distinguished Young Scholars. Grant Number: LR17E030001. Young 1000 Talents Global Recruitment Program of China 100 Talents Program of Zhejiang University.Attached Files
Supplemental Material - admi201800090-sup-0001-s1.pdf
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Additional details
- Eprint ID
- 89033
- Resolver ID
- CaltechAUTHORS:20180822-111321370
- 21674093
- National Natural Science Foundation of China
- 51620105006
- National Natural Science Foundation of China
- 21503203
- National Natural Science Foundation of China
- 51473142
- National Natural Science Foundation of China
- 2014CB643503
- 973 Program
- 2016YFE0102900
- International Science and Technology Cooperation Program of China
- 2017YFA0403403
- National Key Research and Development Program of China
- 2018C01047
- Zhejiang Province Science and Technology Plan
- LR17E030001
- Zhejiang Natural Science Fund for Distinguished Young Scholars
- Young 1000 Talents Global Recruitment Program of China
- Zhejiang University
- Created
-
2018-08-22Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field