TY - JOUR
T1 - Novel Carbazole-Based Hole-Transporting Materials with Star-Shaped Chemical Structures for Perovskite-Sensitized Solar Cells
AU - Kang, Min Soo
AU - Sung, Sang Do
AU - Choi, In Taek
AU - Kim, Hyoungjin
AU - Hong, Munpyo
AU - Kim, Jeongho
AU - Lee, Wan In
AU - Kim, Hwan Kyu
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/10/14
Y1 - 2015/10/14
N2 - Novel carbazole-based hole-transporting materials (HTMs), including extended π-conjugated central core units such as 1,4-phenyl, 4,4′-biphenyl, or 1,3,5-trisphenylbenzene for promoting effective π-π stacking as well as the hexyloxy flexible group for enhancing solubility in organic solvent, have been synthesized as HTM of perovskite-sensitized solar cells. A HTM with 1,3,5-trisphenylbenzene core, coded as SGT-411, exhibited the highest charge conductivity caused by its intrinsic property to form crystallized structure. The perovskite-sensitized solar cells with SGT-411 exhibited the highest PCE of 13.00%, which is 94% of that of the device derived from spiro-OMeTAD (13.76%). Time-resolved photoluminescence spectra indicate that SGT-411 shows the shortest decay time constant, which is in agreement with the trends of conductivity data, indicating it having fastest charge regeneration. In this regard, a carbazole-based HTM with star-shaped chemical structure is considered to be a promising candidate HTM.
AB - Novel carbazole-based hole-transporting materials (HTMs), including extended π-conjugated central core units such as 1,4-phenyl, 4,4′-biphenyl, or 1,3,5-trisphenylbenzene for promoting effective π-π stacking as well as the hexyloxy flexible group for enhancing solubility in organic solvent, have been synthesized as HTM of perovskite-sensitized solar cells. A HTM with 1,3,5-trisphenylbenzene core, coded as SGT-411, exhibited the highest charge conductivity caused by its intrinsic property to form crystallized structure. The perovskite-sensitized solar cells with SGT-411 exhibited the highest PCE of 13.00%, which is 94% of that of the device derived from spiro-OMeTAD (13.76%). Time-resolved photoluminescence spectra indicate that SGT-411 shows the shortest decay time constant, which is in agreement with the trends of conductivity data, indicating it having fastest charge regeneration. In this regard, a carbazole-based HTM with star-shaped chemical structure is considered to be a promising candidate HTM.
KW - carbazole
KW - charge-transfer efficiency
KW - hole-transporting materials
KW - perovskite-sensitized solar cells
KW - star-shaped chemical structures
UR - http://www.scopus.com/inward/record.url?scp=84944329095&partnerID=8YFLogxK
U2 - 10.1021/acsami.5b04662
DO - 10.1021/acsami.5b04662
M3 - Article
AN - SCOPUS:84944329095
SN - 1944-8244
VL - 7
SP - 22213
EP - 22217
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 40
ER -