TY - JOUR
T1 - Mesostructured Fullerene Electrodes for Highly Efficient n-i-p Perovskite Solar Cells
AU - Zhong, Yufei
AU - Munir, Rahim
AU - Balawi, Ahmed Hesham
AU - Sheikh, Arif D.
AU - Yu, Liyang
AU - Tang, Ming Chun
AU - Hu, Hanlin
AU - Laquai, Frédéric
AU - Amassian, Aram
N1 - Funding Information:
This work was supported by the King Abdullah University of Science and Technology. A.H. Balawi and F. Laquai thank K. Vandewal and M. Baier for contributing to the setup for photothermal deflection spectroscopy (PDS). Part of this work was performed at D-line at the Cornell High Energy Synchrotron Source (CHESS) at Cornell University. CHESS is supported by NSF and NIH/NIGMS via NSF Award DMR-1332208. Dr. Detlef-M. Smilgies and Dr. Ruipeng Li from CHESS are thanked for their assistance with beamline setup for the GIWAXS measurements.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/11/11
Y1 - 2016/11/11
N2 - Electron-transporting layers in today's state-of-the-art n-i-p organohalide perovskite solar cells are almost exclusively made of metal oxides. Here, we demonstrate a novel mesostructured fullerene-based electron-transporting material (ETM) that is crystalline, hydrophobic, and cross-linked, rendering it solvent- and heat-resistant for subsequent perovskite solar cell fabrication. The fullerene ETM is shown to enhance the structural and electronic properties of the CH3NH3PbI3 layer grown atop, reducing its Urbach energy from ∼26 to 21 meV, while also increasing crystallite size and improving texture. The resulting mesostructured n-i-p solar cells achieve reduced recombination, improved device-to-device variation, reduced hysteresis, and a power conversion efficiency above 15%, surpassing the performance of similar devices prepared using mesoporous TiO2 and well above the performance of planar heterojunction devices on amorphous or crystalline [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). This work is the first demonstration of a viable, hydrophobic, and high-performance mesostructured electron-accepting contact to work effectively in n-i-p perovskite solar cells.
AB - Electron-transporting layers in today's state-of-the-art n-i-p organohalide perovskite solar cells are almost exclusively made of metal oxides. Here, we demonstrate a novel mesostructured fullerene-based electron-transporting material (ETM) that is crystalline, hydrophobic, and cross-linked, rendering it solvent- and heat-resistant for subsequent perovskite solar cell fabrication. The fullerene ETM is shown to enhance the structural and electronic properties of the CH3NH3PbI3 layer grown atop, reducing its Urbach energy from ∼26 to 21 meV, while also increasing crystallite size and improving texture. The resulting mesostructured n-i-p solar cells achieve reduced recombination, improved device-to-device variation, reduced hysteresis, and a power conversion efficiency above 15%, surpassing the performance of similar devices prepared using mesoporous TiO2 and well above the performance of planar heterojunction devices on amorphous or crystalline [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). This work is the first demonstration of a viable, hydrophobic, and high-performance mesostructured electron-accepting contact to work effectively in n-i-p perovskite solar cells.
UR - http://www.scopus.com/inward/record.url?scp=85018509809&partnerID=8YFLogxK
U2 - 10.1021/acsenergylett.6b00455
DO - 10.1021/acsenergylett.6b00455
M3 - Article
AN - SCOPUS:85018509809
SN - 2380-8195
VL - 1
SP - 1049
EP - 1056
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 5
ER -
