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New efficient (thio)acetalized fullerene monoadducts for organic solar cells: characterization based on solubility, mobility balance, and dark current

We report a systematic study of organic photovoltaic cells using novel spiro-acetalized and (thio)acetalized [60]fullerene monoadducts bearing five- to seven-membered rings. One of these compounds had power-conversion efficiencies of 5.8% with PTB7 and 4.0% with poly(3-hexylthiophene); the latter is...

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Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-01, Vol.3 (3), p.1152-1157
Main Authors: Mikie, Tsubasa, Saeki, Akinori, Masuda, Hiroyuki, Ikuma, Naohiko, Kokubo, Ken, Seki, Shu
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container_title Journal of materials chemistry. A, Materials for energy and sustainability
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creator Mikie, Tsubasa
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Seki, Shu
description We report a systematic study of organic photovoltaic cells using novel spiro-acetalized and (thio)acetalized [60]fullerene monoadducts bearing five- to seven-membered rings. One of these compounds had power-conversion efficiencies of 5.8% with PTB7 and 4.0% with poly(3-hexylthiophene); the latter is comparable to that of the commonly used [6,6]-phenyl-C 61 -butyric acid methyl ester. We investigated the precise factor that governs the device performance by examining the solubility, space-charge-limited current mobility balance of holes and electrons, morphology, and dark current. Single-crystal X-ray diffraction highlighted the key role of compact and flexible spiro ring folding in the rim space in fullerene packing.
doi_str_mv 10.1039/C4TA05965D
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source Royal Society of Chemistry
subjects Balancing
Dark current
Esters
Fullerenes
Photovoltaic cells
Solar cells
Solubility
Sustainability
title New efficient (thio)acetalized fullerene monoadducts for organic solar cells: characterization based on solubility, mobility balance, and dark current
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