8.0% Efficient All-Polymer Solar Cells with High Photovoltage of 1.1 V and Internal Quantum Efficiency near Unity
Artikel i vetenskaplig tidskrift, 2018

In very recent years, growing efforts have been devoted to the development of all-polymer solar cells (all-PSCs). One of the advantages of all-PSCs over the fullerene-based PSCs is the versatile design of both donor and acceptor polymers which allows the optimization of energy levels to maximize the open-circuit voltage (V oc ). However, there is no successful example of all-PSCs with both high V oc over 1 V and high power conversion efficiency (PCE) up to 8% reported so far. In this work, a combination of a donor polymer poly[4,8-bis(5-(2-octylthio)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl-alt-(5-(2-ethylhexyl)-4H-thieno[3,4-c] pyrrole-4,6(5H)-dione)-1,3-diyl] (PBDTS-TPD) with a low-lying highest occupied molecular orbital level and an acceptor polymer poly[[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl] -alt-thiophene-2,5-diyl] (PNDI-T) with a high-lying lowest unoccupied molecular orbital level is used, realizing high-performance all-PSCs with simultaneously high V oc of 1.1 V and high PCE of 8.0%, and surpassing the performance of the corresponding PC 71 BM-based PSCs. The PBDTS-TPD:PNDI-T all-PSCs achieve a maximum internal quantum efficiency of 95% at 450 nm, which reveals that almost all the absorbed photons can be converted into free charges and collected by electrodes. This work demonstrates the advantages of all-PSCs by incorporating proper donor and acceptor polymers to boost both V oc and PCEs.

organic photovoltaics


quantum yield

conjugated polymers

all-polymer solar cells


Xiaofeng Xu

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Zhaojun Li

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Wei Zhang

Lunds universitet

Xiangyi Meng

Xi'an Jiaotong University

Xianshao Zou

Lunds universitet

D. D. Rasi

Technische Universiteit Eindhoven

W. Ma

Xi'an Jiaotong University

A. Yartsev

Lunds universitet

Mats Andersson

Flinders University

R. A. J. Janssen

Technische Universiteit Eindhoven

Ergang Wang

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Advanced Energy Materials

1614-6832 (ISSN) 1614-6840 (eISSN)

Vol. 8 1 1700908

SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER)

Europeiska kommissionen (EU) (EC/FP7/287594), 2011-10-01 -- 2016-03-31.







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