Ternary organic solar cells with improved efficiency and stability enabled by compatible dual-acceptor strategy

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

4 Scopus Citations
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Author(s)

  • Minghai Xiong
  • Jingnan Wu
  • Qunping Fan
  • Qi Liu
  • Junfang Lv
  • And 3 others
  • Xuemei Ou
  • Xia Guo
  • Maojie Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number106227
Journal / PublicationOrganic Electronics
Volume96
Online published4 Jun 2021
Publication statusPublished - Sep 2021

Abstract

To further elevate the power conversion efficiency (PCE) of organic solar cells (OSCs), ternary strategy is one of the most efficient methods via simply incorporating a suitable third component. Here, a nonfullerene small molecule acceptor MOITIC was incorporated into the state-of-art PM6:Y6 binary system to further enhance the photovoltaic performance. Detailed investigation revealed that MOITIC exhibited a good miscibility and compatibility with Y6, forming alloy-like acceptors in the ternary blends. The alloy-like phase promoted the phase separation and optimized the morphology of ternary blend, which afforded higher and more balanced carrier mobility and reduced charge recombination in devices. Moreover, the larger energy offset between PM6 and MOITIC:Y6 acceptor alloy is beneficial to enhance open-circuit voltage (Voc) of corresponding devices. As a consequence, the optimized ternary OSC (PM6:Y6:MOITIC = 1:1:0.1) showed a significantly increased PCE of 17.1% with simultaneously enhanced Voc of 0.882 V, short-circuit current density (Jsc) of 25.6 mA cm−2, and fill factor (FF) of 75.7%, which has about 9% enhancement compared to the control binary PM6:Y6 (15.7%). In addition, the optimized ternary device exhibited better stability. This work indicates that ternary strategy via combining two compatible small molecule acceptors is effective to simultaneously improve the efficiency and stability of OSCs.

Research Area(s)

  • Alloy-like, Compatibility, Nonfullerene acceptor, Stability, Ternary organic solar cell

Citation Format(s)

Ternary organic solar cells with improved efficiency and stability enabled by compatible dual-acceptor strategy. / Xiong, Minghai; Wu, Jingnan; Fan, Qunping; Liu, Qi; Lv, Junfang; Ou, Xuemei; Guo, Xia; Zhang, Maojie.

In: Organic Electronics, Vol. 96, 106227, 09.2021.

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