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Facile Synthetic Route of a Solution-Processable, Thieno[3,4-c]pyrrolo-4,6-dione-Based Conjugated Small Molecule and Control of the Optoelectronic Properties via Processing Additives

1
Miwon Commercial, 49 Wonsiro, Danwongu, Ansan 15610, Gyeonggi-do, Korea
2
School of Integrative Engineering, Chung-Ang University, 84 Heukseok-Ro, Dongjak-gu, Seoul 06974, Korea
3
Department of Chemistry, Hankuk University of Foreign Studies, Yongin 449-791, Gyeonggi-do, Korea
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2018, 8(12), 2644; https://doi.org/10.3390/app8122644
Received: 1 November 2018 / Revised: 28 November 2018 / Accepted: 13 December 2018 / Published: 17 December 2018
(This article belongs to the Section Energy)
In this study, a new type of low-bandgap small molecule has been synthesized with a thieno[3,4-c]pyrrole-4,6-dione (TPD) derivative for application in bulk heterojunction (BJH) solar cells. The series of solar cells were fabricated by blending the TPD-based small molecule (M1) and [6,6]-phenyl C71 butyric acid methyl ester (PC71BM). In order to optimize the performance of solar cells, the nanoscale morphologies of the BHJ layers were controlled via processing additives with 1,8-diiodooctane (DIO) and 1-chloronaphthalene (CN). Therefore, we demonstrated that the use of CN successively suppressed molecular aggregation and demonstrated suitable phase separation, in addition to increasing the power conversion efficiency from 0.36% to 1.86%. View Full-Text
Keywords: thieno[3,4-c]pyrrole-4,6-dione; small molecule bulk heterojunction solar cell; processing additive; morphology; low-bandgap conjugated molecules thieno[3,4-c]pyrrole-4,6-dione; small molecule bulk heterojunction solar cell; processing additive; morphology; low-bandgap conjugated molecules
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MDPI and ACS Style

Kwon, O.; Lim, J.; Park, J.K.; Wang, D.H. Facile Synthetic Route of a Solution-Processable, Thieno[3,4-c]pyrrolo-4,6-dione-Based Conjugated Small Molecule and Control of the Optoelectronic Properties via Processing Additives. Appl. Sci. 2018, 8, 2644.

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