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High‐Performance Non‐Fullerene Organic Solar Cells Based on a Pair of Medium Band Gap Polymer Donor and Perylene Bisimide Derivative Acceptor
Author(s) -
Lee Woosung,
Jung Jae Woong
Publication year - 2016
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600459
Subject(s) - perylene , materials science , fullerene , organic solar cell , energy conversion efficiency , acceptor , band gap , open circuit voltage , polymer solar cell , polymer , thermal stability , chemical engineering , photochemistry , optoelectronics , chemistry , organic chemistry , voltage , composite material , molecule , physics , quantum mechanics , engineering , condensed matter physics
Herein, high performance solution‐processed non‐fullerene organic solar cells employing a medium band gap conjugated polymer (PBDTTS‐TTffBT) and a bay‐linked perylene bisimide derivative (di‐PBI) as an electron donor and acceptor, respectively, have been demonstrated. Owing to the complementary absorption range and well‐matched energy levels, PBDTTS‐TTffBT and di‐PBI have great potential for constructing high‐performance non‐fullerene organic solar cells. The facile control of blend film morphology by careful choice of a processing solvent achieves a promising power conversion efficiency of the device up to 6.51% with high open‐circuit voltage (0.92 V), short circuit current density (10.89 mA cm −2 ), and a fill factor (0.65). Furthermore, the blend film exhibits high thermal stability, retaining >80% of its initial efficiency at 100 °C up to 120 min. This work demonstrates that the medium band gap is a promising candidate as a donor material for constructing high‐performance non‐fullerene organic solar cells.