Theoretical Study on the Photoelectric Properties of a Class of Copolymers Based on Benzodithiophene for Solar Cells

Table 3

Reorganization (), exciton dissociation energy (), charge recombination energy (), the ratio of exciton dissociation rate and charge recombination rate ( : ), and external quantum efficiency (EQE).

Polymer	PBDTTBT	PBDTTTP	PBDTTTO	PBDTTTPD	PBDTTFPD
(eV)	0.69	0.69	0.69	0.67	0.69
(eV)	−1.76	−1.92	−2.10	−2.09	−2.15
(eV)	−0.31	−0.14	−0.29	−0.21	−0.15
:	1.62 × 10^6	2.36 × 10^7	2.13 × 10^11	1.90 × 10^11	2.70 × 10^11
EQE	1.3%	4.1%	3.8%	3.7%	3.6%