- Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi
- Vol: 24 Issue: 1
- Influence of Top Layer Composition on the Photovoltaic Parameters of P3HT:PCBM Organic Solar Cells
Influence of Top Layer Composition on the Photovoltaic Parameters of P3HT:PCBM Organic Solar Cells
Authors : Muhammet Erkan KÖSE
Pages : 257-264
Doi:10.16984/saufenbilder.549216
View : 12 | Download : 5
Publication Date : 2020-02-01
Article Type : Other
Abstract :Spin and spray deposition techniques have been used sequentially to examine the effect of the composition of top blend layer on the photovoltaic properties of organic solar cells using well-known poly(3-hexylthiophene):[6,6]-Phenyl C61 butyric acid methyl ester (P3HT:PCBM) blend. Devices were prepared by spraying an extra layer of P3HT or PCBM (~15 nm) onto spin coated (1:1) blend film. P3HT-rich top phase slightly perturbs photovoltaic activity whereas PCBM-rich top phase drastically changes the power conversion efficiencies with a marked decrease in fill factors. Carrier mobilities were only marginally affected by the presence of spray coated top layers. However, series resistance of top phase P3HT-rich blends remained the same with respect to spin coated sample whereas top phase PCBM-rich blends exhibit relatively higher series resistances for both annealed and non-annealed samples. Based on the presented results, one might speculate that electron injection to cathode with P3HT is almost as efficient as with PCBM for active layers utilizing P3HT:PCBM blend.Keywords : organic photovoltaics, morphology, spray coating, P3HT, PCBM