Photoinduced degradation of organic solar cells with different microstructures  

作　　者：路春希 闫鹏 王金泽 刘爱民 宋德 江潮 

机构地区：[1]College of New Energy, Bohai University [2]CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology [3]School of Physics and Optoelectronic Engineering, Dalian University of Technology [4]Department of Physics, Science College, Changchun University of Science and Technology

出　　处：《Chinese Physics B》2014年第8期189-192,共4页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2011CB932801);the New Teachers’Fund for Doctor Stations,Ministry of Education,China(Grant No.20112216120008)

摘　　要：An in situ measurement setup is established to investigate the photoinduced degradation effects in a controllable inert gas ambient environment for the two different microstructures of poly（3-hexylthiophene） （P3HT） and [6,6]-phenyl-C61- butyricacid methyl ester （PCBM） bulk-heterojunction organic solar cells. The two devices are fabricated with the solvent vapor drying process followed by a thermal annealing （vapor drying device） and only a normal thermal annealing process （control device）, respectively. Their power conversion efficiencies （PCEs） and aging features are compared. Their different degradation behaviors in light absorption are confirmed. In addition, irradiation-induced changes in both nanostructure and surface morphology of the P3HT：PCBM blend films treated with two different fabrication processes are observed through scanning electron microscopy and atomic force microscopy. Aggregated bulbs are observed at the surfaces for control devices after light irradiation for 50 h, while the vapor drying devices exhibit smooth film surfaces, and the corresponding device features are not easy to degrade under the aging measurement. Thus the devices having solvent vapor drying and thermal annealing show better device stabilities than those having only the thermal annealing process.An in situ measurement setup is established to investigate the photoinduced degradation effects in a controllable inert gas ambient environment for the two different microstructures of poly（3-hexylthiophene） （P3HT） and [6,6]-phenyl-C61- butyricacid methyl ester （PCBM） bulk-heterojunction organic solar cells. The two devices are fabricated with the solvent vapor drying process followed by a thermal annealing （vapor drying device） and only a normal thermal annealing process （control device）, respectively. Their power conversion efficiencies （PCEs） and aging features are compared. Their different degradation behaviors in light absorption are confirmed. In addition, irradiation-induced changes in both nanostructure and surface morphology of the P3HT：PCBM blend films treated with two different fabrication processes are observed through scanning electron microscopy and atomic force microscopy. Aggregated bulbs are observed at the surfaces for control devices after light irradiation for 50 h, while the vapor drying devices exhibit smooth film surfaces, and the corresponding device features are not easy to degrade under the aging measurement. Thus the devices having solvent vapor drying and thermal annealing show better device stabilities than those having only the thermal annealing process.

关 键 词：organic solar cells PHOTODEGRADATION solvent vapor drying STABILITY 

分 类 号：TM914.4[电气工程—电力电子与电力传动]