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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41267

Title: Merocyanines for vacuum-deposited small-molecule organic solar cell
Authors: Ko-Wei Chen
Chong-Wei Huang
Shao-Yu Lin
Yi-Hung Liu
Tanmay Chatterjee
Wen-Yi Hung
Shun-Wei Liu
Ken-Tsung Wong
Contributors: 國立臺灣海洋大學:光電科學研究所
Keywords: Organic photovoltaic
Bulk heterojunction
Planar-mixed heterojunction
Small molecule organic solar cell
Date: 2015
Issue Date: 2017-02-13T05:45:44Z
Publisher: Organic Electronics
Abstract: Abstract: We report here synthesis and photovoltaic properties of three merocyanines dyes (DPPT, DTPT, 1-NPPT) which are functionalized with electron withdrawing thiazolidenemalononitrile and electron rich diarylamine functionalities. It is found that structural feature of the diarylamino groups has a profound effect on the physical properties such as the absorption spectrum, oxidation potential, and HOMO/LUMO energy levels. The compound DTPT containing a better electron-donating ditolyl group, exhibits red-shifted absorption with relatively higher molar extinction coefficient, indicating its better light-harvesting ability. Hole mobility of these compounds is found to be strongly dependent on the various intermolecular interactions. Interestingly, single crystal structures reveal that the crystal packing motifs are rather closely related to the observed hole mobility in a trend of DPPT > DTPT > 1-NPPT. Vacuum-processed small-molecule organic solar cells were fabricated using the title merocyanines as p-type materials (donor) in combination with fullerene (C60 or C70) as n-type material (acceptor) with various device configurations. Among them, the DPPT-based devices outperform the devices based on DTPT and 1-NPPT. The power conversion efficiency (PCE) of DPPT-based device was improved from 1.55% of a BHJ device to 2.63% of a PMHJ device and 3.52% of a PMHJ device without the thin donor layer.
Relation: 26
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41267
Appears in Collections:[光電科學研究所] 期刊論文

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