Fibril Network Strategy Enables High-Performance Semitransparent Organic Solar Cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yuanpeng Xie
  • Yunhao Cai
  • Lei Zhu
  • Ruoxi Xia
  • Linglong Ye
  • Xiang Feng
  • Feng Liu
  • Guanghao Lu
  • Songting Tan
  • Yanming Sun

Detail(s)

Original languageEnglish
Article number2002181
Journal / PublicationAdvanced Functional Materials
Volume30
Issue number28
Online published25 May 2020
Publication statusPublished - 9 Jul 2020
Externally publishedYes

Abstract

The development of semitransparent organic solar cells (ST-OSCs) represents a significant step toward the commercialization of OSCs. However, the trade-off between power conversion efficiency (PCE) and average visible transmittance (AVT) restricts further improvements of ST-OSCs. Herein, it is demonstrated that a fibril network strategy can enable ST-OSCs with a high PCE and AVT simultaneously. A wide-bandgap polymer PBT1-C-2Cl that can self-assemble into a fibril nanostructure is used as the donor and a near-infrared small molecule Y6 is adopted as the acceptor. It is found that a tiny amount of PBT1-C-2Cl in the blend can form a high speed pathway for hole transport due to the well distributed fibril nanostructure, which increases the transmittance in the visible region. Meanwhile, the acceptor Y6 guarantees sufficient light absorption. Using this strategy, the optimized ST-OSCs yield a high PCE of 9.1% with an AVT of over 40% and significant light utilization efficiency of 3.65% at donor/acceptor ratio of 0.25:1. This work demonstrates a simple and effective approach to realizing high PCE and AVT of ST-OSCs simultaneously.

Research Area(s)

  • average visible transmittance, fibril network strategy, light utilization efficiency, power conversion efficiency, semitransparent organic solar cells

Citation Format(s)

Fibril Network Strategy Enables High-Performance Semitransparent Organic Solar Cells. / Xie, Yuanpeng; Cai, Yunhao; Zhu, Lei; Xia, Ruoxi; Ye, Linglong; Feng, Xiang; Yip, Hin-Lap; Liu, Feng; Lu, Guanghao; Tan, Songting; Sun, Yanming.

In: Advanced Functional Materials, Vol. 30, No. 28, 2002181, 09.07.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review