Morphological and electrical control of fullerene dimerization determines organic photovoltaic stability

被引:194
作者
Heumueller, Thomas [1 ,2 ]
Mateker, William R. [2 ]
Distler, Andreas [3 ]
Fritze, Urs F. [4 ]
Cheacharoen, Rongrong [2 ]
Nguyen, William H. [2 ]
Biele, Markus [1 ]
Salvador, Michael [1 ]
von Delius, Max [4 ]
Egelhaaf, Hans-Joachim [5 ]
McGehee, Michael D. [2 ]
Brabec, Christoph J. [1 ,5 ,6 ]
机构
[1] FAU Erlangen Nurnberg, Mat Sci & Engn, Erlangen, Germany
[2] Stanford Univ, Mat Sci & Engn, Stanford, CA 94305 USA
[3] Belectric GmbH, Sommerda, Germany
[4] FAU Erlangen Nurnberg, Dept Chem & Pharm, Erlangen, Germany
[5] Energy Campus Nurnberg, Erlangen, Germany
[6] Bavarian Ctr Appl Energy Res, Erlangen, Germany
关键词
SOLID C-60 FILMS; POLYMER SOLAR-CELLS; PHOTOCHEMICAL TRANSFORMATION; ABSORPTION-SPECTROSCOPY; PERFORMANCE; PHOTODEGRADATION; GENERATION; LIFETIMES; P3HT/PCBM; DUMBBELL;
D O I
10.1039/c5ee02912k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Fullerene dimerization has been linked to short circuit current (J(sc)) losses in organic solar cells comprised of certain polymer-fullerene systems. We investigate several polymer-fullerene systems, which present J(sc) loss to varying degrees, in order to determine under which conditions dimerization occurs. By reintroducing dimers into fresh devices, we confirm that the photo-induced dimers are indeed the origin of the J(sc) loss. We find that both film morphology and electrical bias affect the photodimerization process and thus the associated loss of J(sc). In plain fullerene films, a higher degree of crystallinity can inhibit the dimerization reaction, as observed by high performance liquid chromatography (HPLC) measurements. In blend films, the amount of dimerization depends on the degree of mixing between polymer and fullerene. For highly mixed systems with very amorphous polymers, no dimerization is observed. In solar cells with pure polymer and fullerene domains, we tune the fullerene morphology from amorphous to crystalline by thermal annealing. Similar to neat fullerene films, we observe improved light stability for devices with crystalline fullerene domains. Changing the operating conditions of the investigated solar cells from V-oc to J(sc) also significantly reduces the amount of dimerization-related J(sc) loss; HPLC analysis of the active layer shows that more dimers are formed if the cell is held at V-oc instead of J(sc). The effect of bias on dimerization, as well as a clear correlation between PL quenching and reduced dimerization upon addition of small amounts of an amorphous polymer into PC60BM films, suggests a reaction mechanism via excitons.
引用
收藏
页码:247 / 256
页数:10
相关论文
共 55 条
[1]   POLYMERIZED C-60 STUDIED BY FIRST-PRINCIPLES MOLECULAR-DYNAMICS [J].
ADAMS, GB ;
PAGE, JB ;
SANKEY, OF ;
OKEEFFE, M .
PHYSICAL REVIEW B, 1994, 50 (23) :17471-17479
[2]   The Importance of Fullerene Percolation in the Mixed Regions of Polymer-Fullerene Bulk Heterojunction Solar Cells [J].
Bartelt, Jonathan A. ;
Beiley, Zach M. ;
Hoke, Eric T. ;
Mateker, William R. ;
Douglas, Jessica D. ;
Collins, Brian A. ;
Tumbleston, John R. ;
Graham, Kenneth R. ;
Amassian, Aram ;
Ade, Harald ;
Frechet, Jean M. J. ;
Toney, Michael F. ;
McGehee, Michael D. .
ADVANCED ENERGY MATERIALS, 2013, 3 (03) :364-374
[3]   Improved thermal stability of bulk heterojunctions based on side-chain functionalized poly(3-alkylthiophene) copolymers and PCBM [J].
Bertho, Sabine ;
Campo, Bert ;
Piersimoni, Fortunato ;
Spoltore, Donato ;
D'Haen, Jan ;
Lutsen, Laurence ;
Maes, Wouter ;
Vanderzande, Dirk ;
Manca, Jean .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2013, 110 :69-76
[4]   Photochemical origins of burn-in degradation in small molecular weight organic photovoltaic cells [J].
Burlingame, Quinn ;
Tong, Xiaoran ;
Hankett, Jeanne ;
Slootsky, Michael ;
Chen, Zhan ;
Forrest, Stephen R. .
ENERGY & ENVIRONMENTAL SCIENCE, 2015, 8 (03) :1005-1010
[5]   Toward bulk heterojunction polymer solar cells with thermally stable active layer morphology [J].
Cardinaletti, Ilaria ;
Kesters, Jurgen ;
Bertho, Sabine ;
Conings, Bert ;
Piersimoni, Fortunato ;
D'Haen, Jan ;
Lutsen, Laurence ;
Nesladek, Milos ;
Van Mele, Bruno ;
Van Assche, Guy ;
Vandewal, Koen ;
Salleo, Alberto ;
Vanderzande, Dirk ;
Maes, Wouter ;
Manca, Jean V. .
JOURNAL OF PHOTONICS FOR ENERGY, 2014, 4
[6]   Enhanced Performance and Stability of a Polymer Solar Cell by Incorporation of Vertically Aligned, Cross-Linked Fullerene Nanorods [J].
Chang, Chih-Yu ;
Wu, Cheng-En ;
Chen, Shih-Yung ;
Cui, Chaohua ;
Cheng, Yen-Ju ;
Hsu, Chain-Shu ;
Wang, Yuh-Lin ;
Li, Yongfang .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2011, 50 (40) :9386-9390
[7]  
Chiba Y., 2009, Journal of Physics: Conference Series, V159, DOI 10.1088/1742-6596/159/1/012017
[8]   Photodegradation in Encapsulated Silole-Based Polymer: PCBM Solar Cells Investigated using Transient Absorption Spectroscopy and Charge Extraction Measurements [J].
Clarke, Tracey M. ;
Lungenschmied, Christoph ;
Peet, Jeff ;
Drolet, Nicolas ;
Sunahara, Kenji ;
Furube, Akihiro ;
Mozer, Attila J. .
ADVANCED ENERGY MATERIALS, 2013, 3 (11) :1473-1483
[9]   Modeling the temperature induced degradation kinetics of the short circuit current in organic bulk heterojunction solar cells [J].
Conings, Bert ;
Bertho, Sabine ;
Vandewal, Koen ;
Senes, Alessia ;
D'Haen, Jan ;
Manca, Jean ;
Janssen, Rene A. J. .
APPLIED PHYSICS LETTERS, 2010, 96 (16)
[10]   LASER DESORPTION MASS-SPECTROMETRY OF PHOTOPOLYMERIZED C-60 FILMS [J].
CORNETT, DS ;
AMSTER, IJ ;
DUNCAN, MA ;
RAO, AM ;
EKLUND, PC .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (19) :5036-5039