期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 19, 期 30, 页码 5351-5358出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b901302d
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资金
- Sustainable Development Technology Canada ( SDTC)
We have studied the utilization of PCDTBT, an alternating poly(2,7-carbazole) derivative, in organic bulk heterojunction solar cells. The effect of polymer molecular weight, PCDTBT:[60] PCBM ratio, and active layer thickness on the device performance is reported. The best performance was obtained when the number-average molecular weights (M-n) are around 20 kDa with a polydispersity index around 2.2. Both PCDTBT:[60] PCBM ratio and active layer thickness affect the light absorption and the charge transport properties. By optimizing these two parameters, power conversion efficiency (PCE) up to 4.35% was reached under calibrated AM1.5G illumination of 100 mW cm(-2). When blended with [70] PCBM, PCDTBT exhibited a PCE up to 4.6%.
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