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Title: Application of Supramolecular Assembly of Porphyrin Dimers for Bulk heterojunction Solar Cells
Authors: Chen, Yang-Fang
Chen, Jian-Lun
Kashi, Chiranjeevulu
Tsao, Po-Wei
Yeh, Chen-Yu
Lin, Tai-Yuan
Contributors: 國立臺灣海洋大學:光電科學研究所
Date: 2017-09
Issue Date: 2018-07-02T03:11:35Z
Publisher: J. Phys. Chem. C
Abstract: Abstract: Recently, there has been a growing interest in developing porphyrin derivatives as electron donor materials in solution-processed organic solar cells. In contrast to the traditional synthesis route, we adopt a ligand-mediated supramolecular assembly approach to produce a new soluble porphyrin derivative. The complexation of nitrogen lone pairs in the bidentate ligands to the axial orbitals of both zinc atoms in zinc-metalated porphyrin dimers (KC2s) form KC2-duplex. The UV–vis absorbance of KC2-duplex displays a red-shift of the Q-band compared with that of KC2, indicating an improvement of intermolecular interaction. By blending KC2-duplex with [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as the photoactive material for fabricating organic bulk heterojunction solar cells, the devices demonstrate a 38.7% enhancement of short-circuit current density (Jsc) as compared to those made from dimers. The largely enhanced Jsc is attributed to the improved charge transport dynamics of KC2-duplex:PC71BM blend, including the hole and effective mobilities and exciton dissociation probability. When the photoactive film is processed from solvent containing 3% v/v 1-chloronaphthalene, Jsc is further enhanced (∼64.5%) as well as the fill factor (16.7%) for a power conversion efficiency of 3.06% from 1.63%. Our approach shown here can be generalized to other porphyrin-related systems to advance the development of porphyrin-based optoelectronic devices.
Relation: 121(37) pp.20084–20092
Appears in Collections:[Institute of Optoelectronic Sciences] Periodical Articles

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