17.25% high efficiency ternary solar cells with increased open-circuit voltage using a high HOMO level small molecule guest donor in a PM6:Y6 blend
Artikel i vetenskaplig tidskrift, 2021

A small molecule donor TiC12 with an asymmetric thieno[3,2-c]isochromene unit is incorporated into the PM6:Y6 system as the third component for constructing ternary organic solar cells (OSCs). It was found that TiC12 played an outstanding role in improvement of open-circuit voltage (V-oc), short-circuit current (J(sc)) and fill factor (FF) for the OSCs. The effects of TiC12 on the absorption, exciton dissociation, charge extraction, bimolecular recombination and morphology of the active layer are analyzed in detail. The synergetic improvement of J(sc), V-oc and FF parameters is realized to generate an advanced power conversion efficiency (PCE) of 17.25% in the optimized PM6 : TiC12 : Y6 (0.9 : 0.1 : 1.2) ternary device. Furthermore, the V-oc is increased in proportion to the added amount of TiC12 in the ternary devices due to reduced disorder and nonradiative energy loss, although the guest donor TiC12 exhibited a higher HOMO level than PM6. This study provides an effective and innovative approach to elevate V-oc and thus PCE for ternary OSCs by introducing a guest small molecule donor with a higher HOMO level and better miscibility with the acceptor.

Författare

Wei Tang

Changzhou University

Xiangtan University

Wenhong Peng

Hunan Institute of Engineering

Changzhou University

Mengbing Zhu

Changzhou University

Huanxiang Jiang

Jianghan University

Wenchao Wang

Changzhou University

Hao Xia

Changzhou University

Renqiang Yang

Jianghan University

Olle Inganas

Linköpings universitet

Hua Tan

Changzhou University

Qingzhen Bian

Linköpings universitet

Ergang Wang

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Ergang Wang Group

Weiguo Zhu

Xiangtan University

Changzhou University

Journal of Materials Chemistry A

2050-7488 (ISSN)

Vol. In Press

Ämneskategorier

Annan fysik

Annan kemi

Annan elektroteknik och elektronik

DOI

10.1039/d1ta05284e

Mer information

Senast uppdaterat

2021-09-09