Toward bulk heterojunction polymer solar cells with thermally stable active layer morphology

被引:43
作者
Cardinaletti, Ilaria [1 ]
Kesters, Jurgen [1 ]
Bertho, Sabine [1 ]
Conings, Bert [1 ]
Piersimoni, Fortunato [2 ]
D'Haen, Jan [1 ]
Lutsen, Laurence [3 ]
Nesladek, Milos [1 ]
Van Mele, Bruno [4 ]
Van Assche, Guy [4 ]
Vandewal, Koen [5 ]
Salleo, Alberto [6 ]
Vanderzande, Dirk [1 ,3 ]
Maes, Wouter [1 ,3 ]
Manca, Jean V. [1 ,3 ]
机构
[1] Hasselt Univ, Inst Mat Res IMO IMOMEC, B-3590 Diepenbeek, Belgium
[2] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany
[3] IMEC VZW, Associated Lab IMOMEC, B-3590 Diepenbeek, Belgium
[4] Vrije Univ Brussel, Fac Engn Sci, B-1050 Brussels, Belgium
[5] Tech Univ Dresden, Inst Angew Photophys, D-01069 Dresden, Germany
[6] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
来源
JOURNAL OF PHOTONICS FOR ENERGY | 2014年 / 4卷
关键词
organic photovoltaics; bulk heterojunction; thermal stability; phase separation; lifetime; FUNCTIONALIZED POLY(3-ALKYLTHIOPHENE) COPOLYMERS; ORGANIC PHOTOVOLTAIC DEVICES; OPEN-CIRCUIT VOLTAGE; STABILITY; PERFORMANCE; DEGRADATION; VARIETY; BLENDS; BINARY;
D O I
10.1117/1.JPE.4.040997
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
When state-of-the-art bulk heterojunction organic solar cells with ideal morphology are exposed to prolonged storage or operation at elevated temperatures, a thermally induced disruption of the active layer blend can occur, in the form of a separation of donor and acceptor domains, leading to diminished photovoltaic performance. Toward the long-term use of organic solar cells in real-life conditions, an important challenge is, therefore, the development of devices with a thermally stable active layer morphology. Several routes are being explored, ranging from the use of high glass transition temperature, cross-linkable and/or side-chain functionalized donor and acceptor materials, to light-induced dimerization of the fullerene acceptor. A better fundamental understanding of the nature and underlying mechanisms of the phase separation and stabilization effects has been obtained through a variety of analytical, thermal analysis, and electro-optical techniques. Accelerated aging systems have been used to study the degradation kinetics of bulk heterojunction solar cells in situ at various temperatures to obtain aging models predicting solar cell lifetime. The following contribution gives an overview of the current insights regarding the intrinsic thermally induced aging effects and the proposed solutions, illustrated by examples of our own research groups. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License.
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页数:12
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