TY - JOUR
T1 - Small molecule based
T2 - N -phenyl carbazole substituted diketopyrrolopyrroles as donors for solution-processed bulk heterojunction organic solar cells
AU - Patil, Yuvraj
AU - Misra, Rajneesh
AU - Chen, Fang-Chung
AU - Sharma, Ganesh D.
N1 - Publisher Copyright:
© the Owner Societies 2016.
PY - 2016
Y1 - 2016
N2 - We report two acetylene-bridged small molecules DPP5 and DPP6 with low HOMO-LUMO gaps as donors along with PC71BM as an acceptor for the fabrication of solution-processed bulk heterojunction solar cells. After the optimization, i.e. weight ratio of donor to acceptor and surface treatment of the active layer, we achieved overall power conversion efficiencies up to 4.65% (Jsc = 8.19 mA cm-2, Voc = 0.98 V and FF = 0.58) and 5.73% (Jsc = 9.58 mA cm-2, Voc = 0.98 V and FF = 0.61), for DPP5:PC71BM and DPP6:PC71BM respectively, which are superior to those for the devices based on as-cast active layers. The significant change in the power conversion efficiency is attributed to the improvement in nanoscale morphology, balanced charge transport and charge collection efficiency, induced through the surface treatment.
AB - We report two acetylene-bridged small molecules DPP5 and DPP6 with low HOMO-LUMO gaps as donors along with PC71BM as an acceptor for the fabrication of solution-processed bulk heterojunction solar cells. After the optimization, i.e. weight ratio of donor to acceptor and surface treatment of the active layer, we achieved overall power conversion efficiencies up to 4.65% (Jsc = 8.19 mA cm-2, Voc = 0.98 V and FF = 0.58) and 5.73% (Jsc = 9.58 mA cm-2, Voc = 0.98 V and FF = 0.61), for DPP5:PC71BM and DPP6:PC71BM respectively, which are superior to those for the devices based on as-cast active layers. The significant change in the power conversion efficiency is attributed to the improvement in nanoscale morphology, balanced charge transport and charge collection efficiency, induced through the surface treatment.
UR - http://www.scopus.com/inward/record.url?scp=84983431324&partnerID=8YFLogxK
U2 - 10.1039/c6cp03767d
DO - 10.1039/c6cp03767d
M3 - Article
AN - SCOPUS:84983431324
SN - 1463-9076
VL - 18
SP - 22999
EP - 23005
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 33
ER -