Understanding the Charge-Transfer State and Singlet Exciton Emission from Solution-Processed Small-Molecule Organic Solar Cells

被引：28
作者：
Ran, Niva A. [1 ]
Kuik, Martijn [1 ]
Love, John A. [2 ]
Proctor, Christopher M. [2 ]
Nagao, Ikuhiro [1 ]
Bazan, Guillermo C. [1 ]
Thuc-Quyen Nguyen [1 ,3 ]
机构：
[1] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Dept Chem & Biochem, Santa Barbara, CA 93106 USA
[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
[3] King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah, Saudi Arabia
来源：
ADVANCED MATERIALS | 2014年 / 26卷 / 43期
基金：
美国国家科学基金会;
关键词：
OPEN-CIRCUIT VOLTAGE; POLYFLUORENE COPOLYMER; BULK HETEROJUNCTIONS; PHASE-SEPARATION; ENERGY-LOSSES; POLYMER; EFFICIENCY; DONOR; RECOMBINATION; ACCEPTOR;
D O I：
10.1002/adma.201402423
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Electroluminescence (EL) from the charge-transfer state and singlet excitons is observed at low applied voltages from high-performing small-molecule bulk-heterojunction solar cells. Singlet emission from the blends emerges upon altering the processing conditions, such as thermal annealing and processing with a solvent additive, and correlates with improved photovoltaic performance. Low-temperature EL measurements are utilized to access the physics behind the singlet emission.
引用
收藏
页码：7405 / 7412
页数：8
相关论文
共 57 条
[1]   On the Efficiency of Charge Transfer State Splitting in Polymer: Fullerene Solar Cells [J].
Albrecht, Steve ;
Vandewal, Koen ;
Tumbleston, John R. ;
Fischer, Florian S. U. ;
Douglas, Jessica D. ;
Frechet, Jean M. J. ;
Ludwigs, Sabine ;
Ade, Harald ;
Salleo, Alberto ;
Neher, Dieter .
ADVANCED MATERIALS, 2014, 26 (16) :2533-2539
[2]   The Role of Driving Energy and Delocalized States for Charge Separation in Organic Semiconductors [J].
Bakulin, Artem A. ;
Rao, Akshay ;
Pavelyev, Vlad G. ;
van Loosdrecht, Paul H. M. ;
Pshenichnikov, Maxim S. ;
Niedzialek, Dorota ;
Cornil, Jerome ;
Beljonne, David ;
Friend, Richard H. .
SCIENCE, 2012, 335 (6074) :1340-1344
[3]   Formation of a ground-state charge-transfer complex in polyfluorene/[6,6]-phenyl-C61 butyric acid methyl ester (PCBM) blend films and its role in the function of polymer/PCBM solar cells [J].
Benson-Smith, Jessica J. ;
Goris, Ludwig ;
Vandewal, Koen ;
Haenen, Ken ;
Manca, Jean V. ;
Vanderzande, Dirk ;
Bradley, Donal D. C. ;
Nelson, Jenny .
ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (03) :451-457
[4]   Long-Lived Exciplex Formation and Delayed Exciton Emission in Bulk Heterojunction Blends of Silole Derivative and Polyfluorene Copolymer: The Role of Morphology on Exciplex Formation and Charge Separation [J].
Benson-Smith, Jessica J. ;
Wilson, Joanne ;
Dyer-Smith, Clare ;
Mouri, Kazuhiro ;
Yamaguchi, Shigehiro ;
Murata, Hideyuki ;
Nelson, Jenny .
JOURNAL OF PHYSICAL CHEMISTRY B, 2009, 113 (22) :7794-7799
[5]   Delocalization and dielectric screening of charge transfer states in organic photovoltaic cells [J].
Bernardo, B. ;
Cheyns, D. ;
Verreet, B. ;
Schaller, R. D. ;
Rand, B. P. ;
Giebink, N. C. .
NATURE COMMUNICATIONS, 2014, 5
[6]   ELECTRIC-FIELD ASSISTED DISSOCIATION OF CHARGE-TRANSFER STATES AS A MECHANISM OF PHOTOCARRIER PRODUCTION [J].
BRAUN, CL .
JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (09) :4157-4161
[7]   Charge Photogeneration in Organic Solar Cells [J].
Clarke, Tracey M. ;
Durrant, James R. .
CHEMICAL REVIEWS, 2010, 110 (11) :6736-6767
[8]   Design and Synthesis of Molecular Donors for Solution-Processed High-Efficiency Organic Solar Cells [J].
Coughlin, Jessica E. ;
Henson, Zachary B. ;
Welch, Gregory C. ;
Bazan, Guillermo C. .
ACCOUNTS OF CHEMICAL RESEARCH, 2014, 47 (01) :257-270
[9]   Role of the Charge Transfer State in Organic Donor-Acceptor Solar Cells [J].
Deibel, Carsten ;
Strobel, Thomas ;
Dyakonov, Vladimir .
ADVANCED MATERIALS, 2010, 22 (37) :4097-4111
[10]   Electromodulation of photoinduced charge transfer in polyfluorene bilayer devices [J].
Dhoot, AS ;
Hogan, JA ;
Morteani, AC ;
Greenham, NC .
APPLIED PHYSICS LETTERS, 2004, 85 (12) :2256-2258
123456