NDLI: Enhanced performance of reversely transferred, doubly open-ended TiO$_{2}$ nanotube arrays for front-illuminated dye-sensitized solar cells

Content Provider	Springer Nature Link
Author	Kim, Hyunsoo Kang, Soon Hyung Ahn, Kwang Soon Kim, Jae Hong Lee, Soo Yong
Copyright Year	2016
Abstract	Doubly open-ended conventional TiO$_{2}$ nanotube arrays (Type I) and nanoporous-layer-covered nanotube arrays (Type II) were transferred to transparent fluorine-doped tin oxides (FTOs) for front-illuminated dye-sensitized solar cells (DSSCs). FTO/Type II exhibited a long electron lifetime (τ $_{ e }$) and rapid electron transport compared to FTO/Type I because of the reduced surface defect-state-mediated recombination rate. In particular, Type II transferred reversely to the FTO (FTO/Type II-rev) had beneficial geometric effects, leading to a decrease in pore size from the bottom to the top and a nanoporous TiO$_{2}$ thin bottom layer. These enabled more effective light scattering near the FTO and facilitated lateral electron movement toward the FTO, leading to a shortened electron pathway and a reduced recombination rate. The significantly enhanced electron lifetime and the shortened electron transit time of the FTO/Type II-rev improved the charge collection efficiency significantly. Furthermore, the enhanced light scattering increased the light harvesting efficiency. These beneficial geometric effects of FTO/Type II-rev contributed to the greatly enhanced overall cell efficiency (7.61%) of the DSSC compared to the DSSCs with FTO/Type I (5.27%) and FTO/Type II (6.65%).
Starting Page	296
Ending Page	301
Page Count	6
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	68
Issue Number	2
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2016-02-02
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dye-sensitized solar cell Nanotube array Theoretical, Mathematical and Computational Physics Geometric effect Front illumination Physics Particle and Nuclear Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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