TY - JOUR
T1 - Enhanced performance of perovskite solar cells based on vertical TiO 2 nanotube arrays with full filling of CH 3 NH 3 PbI 3
AU - Liang, Xiaoguang
AU - Cheng, Yuanhang
AU - Xu, Xiuwen
AU - Dong, Ruoting
AU - Li, Dapan
AU - Zhou, Ziyao
AU - Wei, Renjie
AU - Dong, Guofa
AU - Tsang, Sai Wing
AU - Ho, Johnny C.
N1 - Funding Information:
This research was financially supported by the General Research Fund of the Research Grants Council of Hong Kong SAR, China (CityU 11275916 )), the National Natural Science Foundation of China (Grants 51672229 ), the Science Technology and Innovation Committee of Shenzhen Municipality (Grant JCYJ20160229165240684 ), and was supported by a grant from the Shenzhen Research Institute, City University of Hong Kong.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Due to a wide range of intriguing properties, such as efficient one-dimensional (1D) electron pathways and extraordinarily large surface areas, titanium dioxide (TiO 2 ) nanotube arrays are considered as the promising electron transport material for high-performance perovskite solar cells (PVSCs). However, it is still a great challenge to directly synthesize the TiO 2 nanotube arrays with well-controlled geometries (e.g., diameter and height, etc.) on the surface of fluorine-doped tin oxide (FTO). Here, vertically standing TiO 2 nanotube arrays with desirable heights and diameters are directly synthesized on the FTO surface by employing the aqueous TiO 2 sol-gel method on tubular photoresist templates. The tube height can be precisely tailored within a range of 350–900 nm for the effective loading of perovskite precursor solution. Importantly, it is demonstrated that TiO 2 nanotube arrays with the optimized tube diameter and length can facilitate the infiltration of perovskite precursor solution, and thus ensuring the formation of a dense, smooth and large grain-sized perovskite film. Moreover, the contact between the perovskite and TiO 2 nanotube arrays are enhanced simultaneously. Benefiting from the high-quality perovskite film, good interfacial contact at the perovskite/TiO 2 tube interface, enhanced light trapping as well as rapid electron collection and transport induced by one-dimensional TiO 2 nanotubes, the fabricated PVSCs exhibit an impressive power conversion efficiency (PCE) of up to 14.13%. Our work does not only demonstrate the promising potential of vertical TiO 2 nanotube arrays for PVSCs, but also provides valuable insights into the design and utilization of TiO 2 nanotubes for practical applications.
AB - Due to a wide range of intriguing properties, such as efficient one-dimensional (1D) electron pathways and extraordinarily large surface areas, titanium dioxide (TiO 2 ) nanotube arrays are considered as the promising electron transport material for high-performance perovskite solar cells (PVSCs). However, it is still a great challenge to directly synthesize the TiO 2 nanotube arrays with well-controlled geometries (e.g., diameter and height, etc.) on the surface of fluorine-doped tin oxide (FTO). Here, vertically standing TiO 2 nanotube arrays with desirable heights and diameters are directly synthesized on the FTO surface by employing the aqueous TiO 2 sol-gel method on tubular photoresist templates. The tube height can be precisely tailored within a range of 350–900 nm for the effective loading of perovskite precursor solution. Importantly, it is demonstrated that TiO 2 nanotube arrays with the optimized tube diameter and length can facilitate the infiltration of perovskite precursor solution, and thus ensuring the formation of a dense, smooth and large grain-sized perovskite film. Moreover, the contact between the perovskite and TiO 2 nanotube arrays are enhanced simultaneously. Benefiting from the high-quality perovskite film, good interfacial contact at the perovskite/TiO 2 tube interface, enhanced light trapping as well as rapid electron collection and transport induced by one-dimensional TiO 2 nanotubes, the fabricated PVSCs exhibit an impressive power conversion efficiency (PCE) of up to 14.13%. Our work does not only demonstrate the promising potential of vertical TiO 2 nanotube arrays for PVSCs, but also provides valuable insights into the design and utilization of TiO 2 nanotubes for practical applications.
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U2 - 10.1016/j.apsusc.2018.04.245
DO - 10.1016/j.apsusc.2018.04.245
M3 - Article
AN - SCOPUS:85046829637
VL - 451
SP - 250
EP - 257
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -