Improved open-circuit voltage of benzodithiophene based polymer solar cells using bulky terthiophene side group

doi:10.1016/j.solmat.2015.02.022

QIBEBT-IR > 先进有机功能材料研究组

	Improved open-circuit voltage of benzodithiophene based polymer solar cells using bulky terthiophene side group
	Liu, Qian 1,2; Bao, Xichang 2; Han, Liangliang 2; Gu, Chuantao 2; Qiu, Meng 2; Du, Zhengkun 2; Sheng, Ruiying 1,2; Sun, Mingliang 1; Yang, Renqiang 2
	2015-07-01
发表期刊	SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷号	138 页码:26-34
摘要	Terthiophene, including one alpha-alpha and one branching alpha-beta connection of the thiophene units, is introduced as benzodithiophene (BDT) side chain to build a novel two-dimensional (2D) conjugated BDT block. By copolymerizing this BDT block with three electron acceptors (DTTz (bis(thiophene-2-yl)-tetrazine), DPP (diketopyrrolopyrrole), DTffBT (4,7-bis(4-hexylthienyl)-5,6-difluoro-2,1,3-benzothiadiazole)) and one electron donor (TTT (2,5-Di(2-thienyl)thiophene)), four terthiophene side-chained benzodithiophene based copolymers were synthesized. Due to the difference in electron affinity among DTTz, DPP, DTffBT and TTT, these four polymers show different UV-vis absorption spectra and optical band gaps (1.3-2.0 eV), while fortunately they all remain deep highest occupied molecular orbital (HOMO) energy levels (-5.3 to 5.6 eV) which is very favorable to high open-circuit voltage (V-oc) polymer solar cells (PSCs). By comparing the photovoltaic properties with polymers which have same backbone but do not have the bulky 2D side group in the literatures, our polymer solar cells devices show higher V-oc. Especially for PQ3 (a copolymer of benzodithiophene and diketopyrrolopyrrole), the donor photon energy loss (E-g-eV(oc)) is 0.51 eV which is almost the lowest value achieved by the researchers. It can be concluded that: the bulky terthiophene side group helps to improve V-oc of the PSCs devices. The overall performance of solar Cells devices is correlated with the molecule conformation, polymer hole mobility and polymer/PCBM blend film morphology. (C) 2015 Elsevier B.V. All rights reserved.
文章类型	Article
关键词	Polymer Solar Cells Open-circuit Voltage Benzodithiophene Terthiophene Side Chain
WOS标题词	Science & Technology ; Technology ; Physical Sciences
DOI	10.1016/j.solmat.2015.02.022
关键词[WOS]	LOW-BANDGAP POLYMERS ; DEEP HOMO LEVEL ; D-A COPOLYMERS ; PHOTOVOLTAIC PROPERTIES ; CONJUGATED POLYMERS ; HIGH-PERFORMANCE ; SEMICONDUCTING POLYMERS ; CONVERSION EFFICIENCY ; TANDEM POLYMER ; BENZOTHIADIAZOLE
收录类别	SCI
语种	英语
WOS研究方向	Energy & Fuels ; Materials Science ; Physics
WOS类目	Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000353747600005
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/6440
专题	先进有机功能材料研究组
作者单位	1.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Shandong, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Qian,Bao, Xichang,Han, Liangliang,et al. Improved open-circuit voltage of benzodithiophene based polymer solar cells using bulky terthiophene side group[J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS,2015,138:26-34.
APA	Liu, Qian.,Bao, Xichang.,Han, Liangliang.,Gu, Chuantao.,Qiu, Meng.,...&Yang, Renqiang.(2015).Improved open-circuit voltage of benzodithiophene based polymer solar cells using bulky terthiophene side group.SOLAR ENERGY MATERIALS AND SOLAR CELLS,138,26-34.
MLA	Liu, Qian,et al."Improved open-circuit voltage of benzodithiophene based polymer solar cells using bulky terthiophene side group".SOLAR ENERGY MATERIALS AND SOLAR CELLS 138(2015):26-34.