Journal
NANO ENERGY
Volume 15, Issue -, Pages 343-352Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2015.04.035
Keywords
Organic photovoltaic; P-type smallmolecule; N-type polymer; Thermal stability; Blend morphology
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Funding
- National Research Foundation of Korea (NRF) - Korean Government [MSIP NRF-2014R1A2A1A05004993]
- Center for Advanced Soft Electronics under the Global Frontier Research Program of the Ministry of Education, Science, and Technology [20110031639]
- Space Core Technology Development Program through the NRF - Ministry of Education [NRF-2014M1A3A3A02034707]
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Because long-term solar cell stability may be influenced by morphological reorganization, we investigated the effect of thermal annealing on bulk heterojunction solar cells comprised of p-DTS(FBITh2)(2):P(NDI2OD-T2) (3:1). Our results indicate that the p-DTS(FBITh2)(2)) compound with lower diffusion kinetics enables to stabilize the blend morphology at high temperature, leading to high thermal stability of a p-DTS(FBTTh2)2:P(NDI2OD-T2) solar cell device. Therefore, The p-DTS(FBTTh2)(2):P(NDI2OD-T2) solar cell indicates highly thermally stable bulk heterojunction device as retaining 70% of its original power conversion efficiency value after heating at 180 degrees C over 20 h. These results indicate that p-DTS(FBTTh2)(2):P(NDI2OD-T2) is a promising BHJ system for practical use in non-fullerene OSCs. (C) 2015 Elsevier Ltd. All rights reserved.
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