Issue 34, 2016, Issue in Progress
From the journal:

RSC Advances

Low band gap diketopyrrolopyrrole-based small molecule bulk heterojunction solar cells: influence of terminal side chain on morphology and photovoltaic performance†

Quoc Viet Hoang,ab   Chang Eun Song,ab   In-Nam Kang,c   Sang-Jin Moon,ab   Sang Kyu Lee,ab   Jong-Cheol Leeab  and  Won Suk Shin*ab  

* Corresponding authors

a Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, Korea
E-mail: shinws@krict.re.kr

b Department of Nanomaterials Science and Engineering, University of Science & Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon, Korea

c Department of Chemistry, The Catholic University of Korea, Gyeonggido 90-2, Korea

Abstract

Two new low band gap small molecules BDT(DPP-TTHex)2 and BDT(DPP-TT)2 with different terminal side chain are designed and synthesized for bulk heterojunction solar cells. BDT(DPP-TTHex)2 is flanked by hexyl at head and tail of backbone while BDT(DPP-TT)2 is free attachment. Both small molecules exhibit similar optical, electrochemical properties and charge carrier mobilities. Nevertheless, BDT(DPP-TT)2 performs optimal film morphology leading to higher short circuit current (JSC) comparing with BDT(DPP-TTHex)2, thus 5.12% power conversion efficiencies (PCE) of BDT(DPP-TT)2 is achieved, higher than 2.36% PCE of BDT(DPP-TTHex)2 under AM1.5G illumination (100 mW cm−2).

Graphical abstract: Low band gap diketopyrrolopyrrole-based small molecule bulk heterojunction solar cells: influence of terminal side chain on morphology and photovoltaic performance

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Article information

DOI
https://doi.org/10.1039/C6RA01103A
Article type
Paper
Submitted
13 Jan 2016
Accepted
09 Mar 2016
First published
11 Mar 2016

RSC Adv., 2016,6, 28658-28665

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Low band gap diketopyrrolopyrrole-based small molecule bulk heterojunction solar cells: influence of terminal side chain on morphology and photovoltaic performance

Q. V. Hoang, C. E. Song, I. Kang, S. Moon, S. K. Lee, J. Lee and W. S. Shin, RSC Adv., 2016, 6, 28658 DOI: 10.1039/C6RA01103A

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