TY - JOUR
T1 - Enhanced performance of polymer solar cells by employing a ternary cascade energy structure
AU - An, Qiaoshi
AU - Zhang, Fujun
AU - Li, Lingliang
AU - Zhuo, Zuliang
AU - Zhang, Jian
AU - Tang, Weihua
AU - Teng, Feng
PY - 2014/8/14
Y1 - 2014/8/14
N2 - We present a route to successfully tackle the two main limitations, low open circuit voltage (Voc) and limited short circuit-density (J sc), of polymer solar cells (PSCs) based on poly(3-hexylthiophene) (P3HT) as an electron-donor. The indene-C60 bisadduct (ICBA) was selected as an electron acceptor to improve the open circuit voltage (Voc). The narrow band gap polymer poly[(4,8-bis-(2-ethylhexyloxy)-benzo[1,2-b:4,5- b′]dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiophene) -2,6-diyl] (PBDTTT-C), as a complementary electron-donor material, was doped into the host system of P3HT:ICBA to form ternary cascade energy structured PSCs with increased Jsc. The power conversion efficiency (PCE) of P3HT:ICBA-based cells was improved from 3.32% to 4.38% by doping with 3 wt% PBDTTT-C with 1 min 150 °C annealing treatment. The 4.38% PCE of ternary PSCs is still larger than the 3.79% PCE of PSCs based on P3HT:ICBA with 10 minutes 150 °C annealing treatment. This journal is
AB - We present a route to successfully tackle the two main limitations, low open circuit voltage (Voc) and limited short circuit-density (J sc), of polymer solar cells (PSCs) based on poly(3-hexylthiophene) (P3HT) as an electron-donor. The indene-C60 bisadduct (ICBA) was selected as an electron acceptor to improve the open circuit voltage (Voc). The narrow band gap polymer poly[(4,8-bis-(2-ethylhexyloxy)-benzo[1,2-b:4,5- b′]dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiophene) -2,6-diyl] (PBDTTT-C), as a complementary electron-donor material, was doped into the host system of P3HT:ICBA to form ternary cascade energy structured PSCs with increased Jsc. The power conversion efficiency (PCE) of P3HT:ICBA-based cells was improved from 3.32% to 4.38% by doping with 3 wt% PBDTTT-C with 1 min 150 °C annealing treatment. The 4.38% PCE of ternary PSCs is still larger than the 3.79% PCE of PSCs based on P3HT:ICBA with 10 minutes 150 °C annealing treatment. This journal is
UR - http://www.scopus.com/inward/record.url?scp=84904136083&partnerID=8YFLogxK
U2 - 10.1039/c4cp01411a
DO - 10.1039/c4cp01411a
M3 - Article
AN - SCOPUS:84904136083
SN - 1463-9076
VL - 16
SP - 16103
EP - 16109
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 30
ER -