Solvent Engineering Boosts the Efficiency of Paintable Carbon-Based Perovskite Solar Cells to Beyond 14%

被引:291
作者
Chen, Haining [1 ]
Wei, Zhanhua [1 ]
He, Hexiang [2 ]
Zheng, Xiaoli [1 ]
Wong, Kam Sing [2 ]
Yang, Shihe [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Dept Chem, William Mong Inst Nano Sci & Technol, Kowloon, Hong Kong, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China
关键词
HOLE-CONDUCTOR-FREE; HIGH-PERFORMANCE; CH3NH3PBI3; PEROVSKITE; SEQUENTIAL DEPOSITION; TRANSPORT; ELECTRON; TEMPERATURE; FILM; RECOMBINATION; GRAPHDIYNE;
D O I
10.1002/aenm.201502087
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Carbon-based hole transport material (HTM)-free perovskite solar cells (PSCs) have shown much promise for practical applications because of their high stability and low cost. However, the efficiencies of this kind of PSCs are still relatively low, especially for the simplest paintable carbon-based PSCs, in comparison with the organic HTM-based PSCs. This can be imputed to the perovskite deposition methods that are not very suitable for this kind of devices. A solvent engineering strategy based on two-step sequential method is exploited to prepare a high-quality perovskite layer for the paintable carbon-based PSCs in which the solvent for CH3NH3I (MAI) solution at the second step is changed from isopropanol (IPA) to a mixed solvent of IPA/Cyclohexane (CYHEX). This mixed solvent not only accelerates the conversion of Pbl(2) to CH(3)NH(3)Pbl(3) but also suppresses the Ostwald ripening process resulting in a high-quality perovskite layer, e.g., pure phase, even surface, and compact capping layer. The paintable carbon-based PSCs fabricated from IPA/CYHEX solvent exhibits a considerable enhancement in photovoltaic performance and performance reproducibility in comparison with that from pure IPA, especially on fill factor (FF), owing mainly to the better contact of perovskite/carbon interface, lower trap density in perovskite, higher light absorption ability, and faster charge transport of perovskite layer. As a result, the highest power conversion efficiency (PCE) of 14.38% is obtained, which is a record value for carbon-based HTM-free PSCs. Furthermore, a PCE of as high as 10% is achieved for the large area device (1 cm(2)), also the highest of its kind.
引用
收藏
页数:10
相关论文
共 75 条
[1]   Depletion region effect of highly efficient hole conductor free CH3NH3PbI3 perovskite solar cells [J].
Aharon, Sigalit ;
Gamliel, Shany ;
El Cohen, Bat ;
Etgar, Lioz .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2014, 16 (22) :10512-10518
[2]   Sequential deposition as a route to high-performance perovskite-sensitized solar cells [J].
Burschka, Julian ;
Pellet, Norman ;
Moon, Soo-Jin ;
Humphry-Baker, Robin ;
Gao, Peng ;
Nazeeruddin, Mohammad K. ;
Graetzel, Michael .
NATURE, 2013, 499 (7458) :316-+
[3]   Remnant PbI2, an unforeseen necessity in high-efficiency hybrid perovskite-based solar cells? [J].
Cao, Duyen H. ;
Stoumpos, Constantinos C. ;
Malliakas, Christos D. ;
Katz, Michael J. ;
Farha, Omar K. ;
Hupp, Joseph T. ;
Kanatzidis, Mercouri G. .
APL MATERIALS, 2014, 2 (09)
[4]   Efficient mesoscopic perovskite solar cells based on the CH3NH3PbI2Br light absorber [J].
Cao, Kun ;
Cui, Jin ;
Zhang, Hua ;
Li, Hao ;
Song, Jinkui ;
Shen, Yan ;
Cheng, Yibing ;
Wang, Mingkui .
JOURNAL OF MATERIALS CHEMISTRY A, 2015, 3 (17) :9116-9122
[5]   A scalable electrodeposition route to the low-cost, versatile and controllable fabrication of perovskite solar cells [J].
Chen, Haining ;
Wei, Zhanhua ;
Zheng, Xiaoli ;
Yang, Shihe .
NANO ENERGY, 2015, 15 :216-226
[6]   Liquid phase deposition of TiO2 nanolayer affords CH3NH3PbI3/nanocarbon solar cells with high open-circuit voltage [J].
Chen, Haining ;
Wei, Zhanhua ;
Yan, Keyou ;
Yi, Ya ;
Wang, Jiannong ;
Yang, Shihe .
FARADAY DISCUSSIONS, 2014, 176 :271-286
[7]   Unveiling Two Electron-Transport Modes in Oxygen-Deficient TiO2 Nanowires and Their Influence on Photoelectrochemical Operation [J].
Chen, Haining ;
Wei, Zhanhua ;
Yan, Keyou ;
Bai, Yang ;
Yang, Shihe .
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2014, 5 (16) :2890-2896
[8]   Best Practices in Perovskite Solar Cell Efficiency Measurements. Avoiding the Error of Making Bad Cells Look Good [J].
Christians, Jeffrey A. ;
Manser, Joseph S. ;
Kamat, Prashant V. .
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2015, 6 (05) :852-857
[9]   Tuning the Light Emission Properties by Band Gap Engineering in Hybrid Lead Halide Perovskite [J].
D'Innocenzo, Valerio ;
Kandada, Ajay Ram Srimath ;
De Bastiani, Michele ;
Gandini, Marina ;
Petrozza, Annamaria .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2014, 136 (51) :17730-17733
[10]   Excitons versus free charges in organo-lead tri-halide perovskites [J].
D'Innocenzo, Valerio ;
Grancini, Giulia ;
Alcocer, Marcelo J. P. ;
Kandada, Ajay Ram Srimath ;
Stranks, Samuel D. ;
Lee, Michael M. ;
Lanzani, Guglielmo ;
Snaith, Henry J. ;
Petrozza, Annamaria .
NATURE COMMUNICATIONS, 2014, 5