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题名: Improved Efficiency of Bulk Heterojunction Polymer Solar Cells by Doping Low-Bandgap Small Molecules
作者: An, Qiaoshi1;  Zhang, Fujun1;  Li, Lingliang1;  Wang, Jian1;  Zhang, Jian2;  Zhou, Lingyu2;  Tang, Weihua3
关键词: polymer solar cells ;  ternary bulk heterojunction ;  low bandgap materials ;  energy transfer
刊名: ACS APPLIED MATERIALS & INTERFACES
发表日期: 2014-05-14
DOI: 10.1021/am500074s
卷: 6, 期:9, 页:6537-6544
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Science & Technology - Other Topics ;  Materials Science
英文摘要: We present performance improved ternary bulk heterojunction polymer solar cells by doping a small molecule, 2,4-bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl] squaraine (DIB-SQ), into the common binary blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C-71-butyric acid methyl ester (PC71BM). The optimized power conversion efficiency (PCE) of P3HT:PC71BM-based cells was improved from 3.05% to 3.72% by doping 1.2 wt % DIB-SQ as the second electron donor, which corresponds to, similar to 22% PCE enhancement. The main contributions of doping DIB-SQ material on the improved performance of PSCs can be summarized as (i) harvesting more photons in the low-energy range, (ii) increased exciton dissociation, energy transfer, and charge carrier transport in the ternary blend films. The energy transfer process from P3HT to DIB-SQ is demonstrated by time-resolved transient photoluminescence spectra through monitoring the lifetime of 700 nm emission from neat P3HT, DIB-SQ and blended P3HT:DIB-SQ solutions. The lifetime of 700 nm emission is increased from 0.9 ns for neat P3HT solution, to 4.9 ns for neat DIB-SQ solution, to 6.2 ns for P3HT:DIB-SQ blend solution.
关键词[WOS]: OPEN-CIRCUIT VOLTAGE ;  ORGANIC PHOTOVOLTAICS ;  IR SENSITIZATION ;  TERNARY BLENDS ;  GAP POLYMER ;  PERFORMANCE ;  P3HT/PCBM ;  MORPHOLOGY ;  ACCEPTOR ;  DEVICES
语种: 英语
WOS记录号: WOS:000336075300065
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145452
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Beijing Jiaotong Univ, Key Lab Luminescence & Opt Informat, Minist Educ, Beijing 100044, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Nanjing Univ Sci & Technol, Key Lab Soft Chem & Funct Mat, Minist Educ, Nanjing 210094, Jiangsu, Peoples R China

Recommended Citation:
An, Qiaoshi,Zhang, Fujun,Li, Lingliang,et al. Improved Efficiency of Bulk Heterojunction Polymer Solar Cells by Doping Low-Bandgap Small Molecules[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(9):6537-6544.
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