Simultaneously Improved Efficiency and Stability in All-Polymer Solar Cells by a P-i-N Architecture

Bryon Larson, Yalong Xu, Jianyu Yuan, Shuyan Liang, Jing-De Chen, Yuxin Xia, Yusheng Wang, Gregory Su, Yannan Zhang, Chaohua Cui, Ming Wang, Haibin Zhao, Wanli Ma

Research output: Contribution to journalArticlepeer-review

129 Scopus Citations

Abstract

All-polymer organic solar cells offer exceptional stability. Unfortunately, the use of bulk heterojunction (BHJ) structure has the intrinsic challenge to control the side-chain entanglement and backbone orientation to achieve sophisticated phase separation in all-polymer blends. Here, we revealed that the P-i-N structure can outperform the BHJ ones with a nearly 50% efficiency improvement, reaching a power conversion efficiency approaching 10%. This P-i-N structure can also provide an enhanced internal electric field and remarkably stable morphology under harsh thermal stress. We have further demonstrated generality of the P-i-N structure in several other all-polymer systems. Considering the adjustable polymer molecular weight and solubility, the P-i-N device structure can be more beneficial for all-polymer systems. With the design of more crystalline polymers, the antiquated P-i-N structure can further show its strength in all-polymer systems by simplified morphology control and improved carrier extraction, becoming a more favorite device structure than the dominant BHJ structure.

Original languageAmerican English
Pages (from-to)2277-2286
Number of pages10
JournalACS Energy Letters
Volume4
Issue number9
DOIs
StatePublished - 13 Sep 2019

Bibliographical note

Publisher Copyright:
Copyright © 2019 American Chemical Society.

NREL Publication Number

  • NREL/JA-5900-74834

Keywords

  • high performance
  • OPV
  • planar heterojunction
  • polymer solar cell
  • stability

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