| Chen Zi-guo,Liu Peng-yi,Hou Lin-tao,Mai Wen-jie,Wu Bing.Optimization and degradation of rubrene/C70 heterojunction solar cells[J].Optoelectronics Letters,2012,8(2):93-96 |
| Optimization and degradation of rubrene/C70 heterojunction solar cells |
| Author Name | Affiliation | | Chen Zi-guo | Department of Physics, Jinan University, Guangzhou 510632, China | | Liu Peng-yi | Department of Physics, Jinan University, Guangzhou 510632, China
Siyuan Lab., Jinan University, Guangzhou 510632, China | | Hou Lin-tao | Department of Physics, Jinan University, Guangzhou 510632, China
Siyuan Lab., Jinan University, Guangzhou 510632, China | | Mai Wen-jie | Department of Physics, Jinan University, Guangzhou 510632, China
Siyuan Lab., Jinan University, Guangzhou 510632, China | | Wu Bing | Department of Physics, Jinan University, Guangzhou 510632, China |
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| Abstract: |
| Small molecule organic solar cells (OSCs) with the structure of indium tin oxide (ITO)/molybdenum trioxide (MoO3) (5 nm)/rubrene (χ nm)/fullerene (C70) (y nm)/2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline (BCP) (6 nm)/aluminum (Al) (150 nm) are fabricated. The thickness of
active layer for the devices is investigated in details. The results show that the optimum thicknesses of rubrene layer and
C70 layer are 30 nm and 25 nm, respectively. The degradation of the device is also investigated. The result indicates that the
open-circuit voltage (V
oc) does not change, while the short-circuit current density (J
sc), fill factor (FF) and power conversion efficiency (PCE) decrease continuously with time. The degradation can be attributed
to the oxygen in ambient diffusing and infiltrating into the active materials and reacting with C70 in cells, which can result in the increase of interfacial series resistance. |
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| This work has been supported by the Natural Science Foundation of Guangdong Province of China (No.06025173 |
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