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

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 先进有机功能材料团队

	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, Renqiang2
刊名	SOLAR ENERGY MATERIALS AND SOLAR CELLS
	2015-07-01
卷号	138 页码:26-34
关键词	Polymer solar cells Open-circuit voltage Benzodithiophene Terthiophene side chain
英文摘要	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.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]	Energy & Fuels ; Materials Science ; Physics
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记录号	WOS:000353747600005
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/6440]
专题	青岛生物能源与过程研究所_先进有机功能材料团队
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.