Bending-stability Interfacial Layer as Dual Electron Transport Layer for Flexible Organic Photovoltaics

Guodong Xu; Xiaotian Hu; Xunfan Liao; Yiwang Chen

doi:10.1007/s10118-021-2586-z

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Bending-stability Interfacial Layer as Dual Electron Transport Layer for Flexible Organic Photovoltaics

ARTICLE | Updated：2021-06-04

- Bending-stability Interfacial Layer as Dual Electron Transport Layer for Flexible Organic Photovoltaics
- Chinese Journal of Polymer Science Vol. 39, Issue 11, Pages: 1441-1448(2021)
- Affiliations：
  
  a.Institute of Advanced Scientific Research (iASR), Jiangxi Normal University, Nanchang 330022, China
  b.Key Laboratory of Functional Small Molecules for Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
  c.Analysis and Testing Center, Jiangxi Normal University, Nanchang 330022, China
  d.Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, Nanchang 330031, China
- Author bio：
  
  happyhu@ncu.edu.cn (X.H.)
  ywchen@ncu.edu.cn (Y.C.)
- Funds：
- DOI：10.1007/s10118-021-2586-z
  CLC：
- Received：23 February 2021，
  
  Revised：2021-3-25，
  
  Accepted：01 April 2021，
  
  Online First：04 June 2021，
  
  Published：18 September 2021
- Accepted：
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Xu, G.; Hu, X.; Liao, X.; Chen, Y. Bending-stability interfacial layer as dual electron transport layer for flexible organic photovoltaics. Chinese J. Polym. Sci. 2021, 39, 1441–1448

Guodong Xu, Xiaotian Hu, Xunfan Liao, et al. Bending-stability Interfacial Layer as Dual Electron Transport Layer for Flexible Organic Photovoltaics[J]. Chinese Journal of Polymer Science, 2021, 39(11): 1441-1448.
Xu, G.; Hu, X.; Liao, X.; Chen, Y. Bending-stability interfacial layer as dual electron transport layer for flexible organic photovoltaics. Chinese J. Polym. Sci. 2021, 39, 1441–1448 DOI： 10.1007/s10118-021-2586-z.

Guodong Xu, Xiaotian Hu, Xunfan Liao, et al. Bending-stability Interfacial Layer as Dual Electron Transport Layer for Flexible Organic Photovoltaics[J]. Chinese Journal of Polymer Science, 2021, 39(11): 1441-1448. DOI： 10.1007/s10118-021-2586-z.

摘要

Abstract

The flexibility of organic photovoltaics (OPVs) has attracted worldwide attention in recent years. To realize the bending-stability of OPVs

it is necessary to put forward the bending-stability of interfacial layer. A novel bendable composite is explored and successfully applied as an electron transport layer (ETL) for fully-flexible OPVs. We incorporated poly(vinylpyrrolidone)(PVP) into conjugated electrolytes (CPE) to composite a bendable ETL for high-performance OPVs devices. Fortunately

the devices based on PVP-modified CPE exhibited better device performances and more excellent mechanical properties of bendability. The fullerene-free OPVs based on PM6:IT-4F with CPE@PVP as ETLs yield the best power conversion efficiency (PCE) of 13.42%. Moreover

a satisfying efficiency of 12.59% has been obtained for the fully-flexible OPVs. As far as we know

this is one of the highest PCE for fully-flexible OPV based PM6:IT-4F system. More importantly

the flexible OPVs devices can retain more than 80% of its initial efficiency after 5000 bending cycles. Furthermore

among various curvature radii

the mechanical properties of the device based on CPE@PVP are superior to those of the device based on bare CPE as ETL. These findings indicate that the functional flexibility of CPE as a cathode interfacial layer is an effective strategy to fabricate high-performance flexible devices in the near future.

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references

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