TY - JOUR
T1 - Tailor-Making Low-Cost Spiro[fluorene-9,9′-xanthene]-Based 3D Oligomers for Perovskite Solar Cells
AU - Xu, Bo
AU - Zhang, Jinbao
AU - Hua, Yong
AU - Liu, Peng
AU - Wang, Linqin
AU - Ruan, Changqing
AU - Li, Yuanyuan
AU - Boschloo, Gerrit
AU - Johansson, Erik M.J.
AU - Kloo, Lars
AU - Hagfeldt, Anders
AU - Jen, Alex K.-Y.
AU - Sun, Licheng
PY - 2017/5/11
Y1 - 2017/5/11
N2 - The power-conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have increased rapidly from about 4% to 22% during the past few years. One of the major challenges for further improvement of the efficiency of PSCs is the lack of sufficiently good hole transport materials (HTMs) to efficiently scavenge the photogenerated holes and aid the transport of the holes to the counter-electrode in the PSCs. In this study, we tailor-made two low-cost spiro[fluorene-9,9′-xanthene] (SFX)-based 3D oligomers, termed X54 and X55, by using a one-pot synthesis approach for PSCs. One of the HTMs, X55, gives a much deeper HOMO level and a higher hole mobility and conductivity than the state-of-the-art HTM, Spiro-OMeTAD. PSC devices based on X55 as the HTM show a very impressive PCE of 20.8% under 100 mW·cm−2 AM1.5G solar illumination, which is much higher than the PCE of the reference devices based on Spiro-OMeTAD (18.8%) and X54 (13.6%) under the same conditions.
AB - The power-conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have increased rapidly from about 4% to 22% during the past few years. One of the major challenges for further improvement of the efficiency of PSCs is the lack of sufficiently good hole transport materials (HTMs) to efficiently scavenge the photogenerated holes and aid the transport of the holes to the counter-electrode in the PSCs. In this study, we tailor-made two low-cost spiro[fluorene-9,9′-xanthene] (SFX)-based 3D oligomers, termed X54 and X55, by using a one-pot synthesis approach for PSCs. One of the HTMs, X55, gives a much deeper HOMO level and a higher hole mobility and conductivity than the state-of-the-art HTM, Spiro-OMeTAD. PSC devices based on X55 as the HTM show a very impressive PCE of 20.8% under 100 mW·cm−2 AM1.5G solar illumination, which is much higher than the PCE of the reference devices based on Spiro-OMeTAD (18.8%) and X54 (13.6%) under the same conditions.
KW - 3D
KW - efficiency
KW - hole transport materials
KW - oligomers
KW - perovskite solar cell
KW - spiro
KW - spiro(fluorene-9,9′-xanthene)
KW - tailor-making
UR - http://www.scopus.com/inward/record.url?scp=85019132357&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85019132357&origin=recordpage
U2 - 10.1016/j.chempr.2017.03.011
DO - 10.1016/j.chempr.2017.03.011
M3 - RGC 21 - Publication in refereed journal
SN - 2451-9308
VL - 2
SP - 676
EP - 687
JO - Chem
JF - Chem
IS - 5
ER -
