High-photovoltage all-polymer solar cells based on a diketopyrrolopyrrole-isoindigo acceptor polymer
Artikel i vetenskaplig tidskrift, 2017

In this work, we synthesized and characterized two new n-type polymers PTDPP-PyDPP and PIID-PyDPP. The former polymer is composed of pyridine-flanked diketopyrrolopyrrole (PyDPP) and thiophene-flanked diketopyrrolopyrrole (TDPP). The latter polymer consists of PyDPP and isoindigo (IID). PIID-PyDPP exhibits a much higher absorption coefficient compared to the widely used naphthalene diimide (NDI)-based acceptor polymers, and its high-lying LUMO level affords it to achieve a high open-circuit voltage (V-oc). As a result, an all-polymer solar cell (all-PSC) fabricated from a high band gap polymer PBDTTS-FTAZ as the donor and PIID-PyDPP as the acceptor attained a high V-oc of 1.07 V with a power conversion efficiency (PCE) of 4.2%. So far, it has been one of the highest PCEs recorded from all-PSCs using diketopyrrolopyrrole (DPP)-based acceptors. Gratifyingly, no obvious PCE decay was observed in two weeks, unraveling good stability of the all-PSC. This work demonstrates that the electron-withdrawing PyDPP unit can be a promising building block for new acceptor polymers in all-PSCs.


Zhaojun Li

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Xiaofeng Xu

Chalmers, Kemi och kemiteknik, Tillämpad kemi

W. Zhang

Lunds universitet

Z. Genene

Addis Ababa University

W. Mammo

Addis Ababa University

A. Yartsev

Lunds universitet

Mats Andersson

University of South Australia

R. A. J. Janssen

Technische Universiteit Eindhoven

Ergang Wang

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Journal of Materials Chemistry A

20507488 (ISSN) 20507496 (eISSN)

Vol. 5 23 11693-11700

SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER)

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







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