8.0% Efficient All-Polymer Solar Cells with High Photovoltage of 1.1 V and Internal Quantum Efficiency near Unity
Journal article, 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

photovoltage

quantum yield

conjugated polymers

all-polymer solar cells

Author

Xiaofeng Xu

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Zhaojun Li

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Wei Zhang

Lund University

Xiangyi Meng

Xi'an Jiaotong University

Xianshao Zou

Lund University

D. D. Rasi

Technische Universiteit Eindhoven

W. Ma

Xi'an Jiaotong University

A. Yartsev

Lund University

Mats Andersson

Flinders University

R. A. J. Janssen

Technische Universiteit Eindhoven

Ergang Wang

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Advanced Energy Materials

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

Vol. 8 1 1700908

SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER)

European Commission (FP7), 2011-10-01 -- 2016-03-31.

Areas of Advance

Energy

Subject Categories

Chemical Sciences

DOI

10.1002/aenm.201700908

More information

Latest update

7/4/2018 2