TY - JOUR
T1 - Effects of nematic liquid crystal additives on the performance of polymer solar cells
AU - Jeong, Seonju
AU - Kwon, Younghwan
AU - Choi, Byeong Dae
AU - Kwak, Giseop
AU - Han, Yoon Soo
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Nematic liquid crystals (NLCs), 4-cyano-4′-pentylbiphenyl and 4-cyano-4′-octylbiphenyl, were applied as additives to polymer solar cells with P3HT:PC61BM blend films. The incorporation of NLC additives led to a higher absorbance of the blend film, a higher crystallinity of P3HT, closer P3HT chains, larger PC61BM domains and enhanced hole/electron mobilities even without post-thermal annealing. The non-annealed PSC with 4 wt.-% 8CB additives showed an increase in all parameters, resulting in a power conversion efficiency of 3.72% compared to 2.14% of the reference device without NLC additives. Nematic liquid crystals (NLCs) are applied as additives to polymer solar cells consisting of P3HT:PC61BM blend films. The incorporation of NLC additives leads to a considerable improvement in power conversion efficiency even without post-thermal annealing, due to a higher absorbance of the blend film, a higher crystallinity of P3HT, closer P3HT chains, larger PC61BM domains and enhanced hole/electron mobilities.
AB - Nematic liquid crystals (NLCs), 4-cyano-4′-pentylbiphenyl and 4-cyano-4′-octylbiphenyl, were applied as additives to polymer solar cells with P3HT:PC61BM blend films. The incorporation of NLC additives led to a higher absorbance of the blend film, a higher crystallinity of P3HT, closer P3HT chains, larger PC61BM domains and enhanced hole/electron mobilities even without post-thermal annealing. The non-annealed PSC with 4 wt.-% 8CB additives showed an increase in all parameters, resulting in a power conversion efficiency of 3.72% compared to 2.14% of the reference device without NLC additives. Nematic liquid crystals (NLCs) are applied as additives to polymer solar cells consisting of P3HT:PC61BM blend films. The incorporation of NLC additives leads to a considerable improvement in power conversion efficiency even without post-thermal annealing, due to a higher absorbance of the blend film, a higher crystallinity of P3HT, closer P3HT chains, larger PC61BM domains and enhanced hole/electron mobilities.
KW - additive
KW - nematic liquid crystal
KW - P3HT
KW - PCBM
KW - polymer solar cell
UR - http://www.scopus.com/inward/record.url?scp=78649810406&partnerID=8YFLogxK
U2 - 10.1002/macp.201000379
DO - 10.1002/macp.201000379
M3 - Article
AN - SCOPUS:78649810406
SN - 1022-1352
VL - 211
SP - 2474
EP - 2479
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
IS - 23
ER -