TY - JOUR
T1 - Highly efficient air-stable/hysteresis-free flexible inverted-type planar perovskite and organic solar cells employing a small molecular organic hole transporting material
AU - Reddy, Saripally Sudhaker
AU - Shin, Sungmin
AU - Aryal, Um Kanta
AU - Nishikubo, Ryosuke
AU - Saeki, Akinori
AU - Song, Myungkwan
AU - Jin, Sung Ho
PY - 2017/11
Y1 - 2017/11
N2 - To acknowledge exceptionally productive flexible perovskite solar cells, low-temperature-processable efficient organic hole transporting materials are very significant for the emerging photovoltaic research. A new organic small molecular hole transporting material (N-(4-(9H-carbazol-9-yl)phenyl)-7-(4-(bis(4-methoxyphenyl)amino)phenyl)-N-(7-(4-(bis(4-methoxyphenyl)amino)phenyl)-9,9-dioctyl-9H-fluoren-2-yl)-9,9-dioctyl-9H-fluoren-2-amine (CzPAF-TPA)) has been rationally designed and synthesized for both highly efficient solution-processed flexible and rigid inverted-type planar heterojunction perovskite solar cells (i-PSCs) and flexible and rigid bulk heterojunction inverted organic solar cells (BHJ IOSCs). The dopant-free CzPAF-TPA-based device displayed significantly improved device performance in solution-processed flexible i-PSCs and flexible BHJ IOSCs with power conversion efficiencies (PCEs) of 12.46% and 7.52%, respectively, with negligible hysteresis, which is superior to that of standard HTM. Furthermore, the high PCE was recorded on rigid ITO substrate in dopant-free i-PSCs (PCE ~ 15.71%) and BHJ IOSCs (PCE ~ 8.74%). Notably, the promising technique of flash-photolysis time-resolved microwave conductivity was also well correlated with the obtained results. In addition to their high device performance in flexible as well as rigid i-PSCs and flexible BHJ IOSCs, they also showed long-term stability over 500 h and 30 days with minimal loss of initial performance.
AB - To acknowledge exceptionally productive flexible perovskite solar cells, low-temperature-processable efficient organic hole transporting materials are very significant for the emerging photovoltaic research. A new organic small molecular hole transporting material (N-(4-(9H-carbazol-9-yl)phenyl)-7-(4-(bis(4-methoxyphenyl)amino)phenyl)-N-(7-(4-(bis(4-methoxyphenyl)amino)phenyl)-9,9-dioctyl-9H-fluoren-2-yl)-9,9-dioctyl-9H-fluoren-2-amine (CzPAF-TPA)) has been rationally designed and synthesized for both highly efficient solution-processed flexible and rigid inverted-type planar heterojunction perovskite solar cells (i-PSCs) and flexible and rigid bulk heterojunction inverted organic solar cells (BHJ IOSCs). The dopant-free CzPAF-TPA-based device displayed significantly improved device performance in solution-processed flexible i-PSCs and flexible BHJ IOSCs with power conversion efficiencies (PCEs) of 12.46% and 7.52%, respectively, with negligible hysteresis, which is superior to that of standard HTM. Furthermore, the high PCE was recorded on rigid ITO substrate in dopant-free i-PSCs (PCE ~ 15.71%) and BHJ IOSCs (PCE ~ 8.74%). Notably, the promising technique of flash-photolysis time-resolved microwave conductivity was also well correlated with the obtained results. In addition to their high device performance in flexible as well as rigid i-PSCs and flexible BHJ IOSCs, they also showed long-term stability over 500 h and 30 days with minimal loss of initial performance.
KW - Bulk heterojunction organic solar cells
KW - Flexible/rigid inverted-type perovskite solar cells
KW - Hysteresis-free
KW - Small molecular organic hole transporting material
KW - Stability
KW - Time-resolved microwave conductivity
UR - http://www.scopus.com/inward/record.url?scp=85028981049&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2017.09.009
DO - 10.1016/j.nanoen.2017.09.009
M3 - Journal article
AN - SCOPUS:85028981049
SN - 2211-2855
VL - 41
SP - 10
EP - 17
JO - Nano Energy
JF - Nano Energy
ER -