Detailed analysis of bulk heterojunction organic solar cells based on P3HT:PCBM

摘要

Polymer:fullerene bulk-heterojunction hybrid solar cells with the structure indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate)(PEDOT:PSS)/poly(3-hexylthiophene)(P3HT):[6,6]-phe nylC61-butyric(PCBM)/bathophenanthroline(Bphen)/Ag were fabricated. In this paper, the electrical characteristics of bulk heterojunction organic solar cells with various thickness of P3HT:PCBM as the active layer and Bphen as an exciton-blocking layer(EBL) were studied. The results showed that the P3HT:PCBM layer at about 110nm perform best, the open circuit voltage(V_(OC)) , short circuit current(J_(SC)) and the power conversion efficiency(PCE) reach to 0.57V, 10.82mA/cm~2, 2.50%, respectively; then when Bphen was 1nm, Voc is 0.56V, J_(SC) is 12.64mA/cm~2, PCE reach the maximum 3.30%.