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

被引：27
|
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.
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页码：7405 / 7412
页数：8
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