Open AccessCharge carrier transport properties in ternary Si-PCPDTBT:P3HT:PCBM solar cells
Author(s) -
Julius Važgėla,
Meera Stephen,
G. Juška,
K. Genevičius,
K. Arlauskas
Publication year - 2017
Publication title -
lithuanian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.269
H-Index - 16
eISSN - 2424-3647
pISSN - 1648-8504
DOI - 10.3952/physics.v57i1.3454
Subject(s) - ternary operation , materials science , fullerene , polymer solar cell , band gap , charge carrier , active layer , polymer , polymer blend , electron mobility , solar cell , chemical engineering , optoelectronics , layer (electronics) , nanotechnology , composite material , copolymer , organic chemistry , chemistry , computer science , engineering , programming language , thin film transistor
In this work we investigate ternary blends of an active layer in bulk heterojunction solar cells and estimate the influence of their composition on solar cell parameters such as efficiency, mobility and recombination. The studied ternary blends are composed of low bandgap polymer poly[2,6-(4,4-bis(2-ethylhexyl)dithieno[3,2-b:2,3-d]silole)-alt-4,7-(2,1,3 benzothiadiazole)] (Si-PCPDTBT), high bandgap polymer poly(3-hexylthiophene-2,5-diyl) (P3HT) and fullerene derivative [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM). The Langevin recombination reduction factor as well as charge carrier mobilities show an increasing trend with increasing Si-PCPDTBT content in the blends. The highest efficiencies have been achieved for the optimized blends of Si-PCPDTBT:P3HT:PCBM with ratios of 0.4:0.6:1, respectively.