NDLI: Enhanced dye-sensitized solar cells performance using anatase $TiO_{2}$ mesocrystals with the Wulff construction of nearly 100% exposed {101} facets as effective light scattering layer

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Song, Yeping Zhou, Yu Wang, Xinyu Wang, Hai Ye, Naiqing Fang, Liang Wang, Linjiang
Description	Author Affiliation: Zhou Y ( Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, Guilin, 541004, China. hbwanghai@gmail.com.)
Abstract	Anatase $TiO_{2}$ mesocrystals with a Wulff construction of nearly 100% exposed {101} facets were successfully synthesized by a facile, green solvothermal method. Their morphology, and crystal structure are characterized by powder X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). Accordingly, a possible growth mechanism of anatase $TiO_{2}$ mesocrystals is elucidated in this work. The as-prepared single anatase $TiO_{2}$ mesocrystal's mean center diameter is about 500 nm, and the length is about 1 μm. They exhibit high light adsorbance, high reflectance and low transmittance in the visible region due to the unique nearly 100% exposed {101} facets. When utilized as the scattering layer in dye-sensitized solar cells (DSSCs), such mesocrystals effectively enhanced light harvesting and led to an increase of the photocurrent of the DSSCs. As a result, by using an anatase $TiO_{2}$ mesocrystal film as a scattering overlayer of a compact commercial P25 $TiO_{2}$ nanoparticle film, the double layered DSSCs show a power conversion efficiency of 7.23%, indicating a great improvement compared to the DSSCs based on a P25 film (5.39%) and anatase $TiO_{2}$ mesocrystal films, respectively. The synergetic effect of P25 and the mesocrystals as well as the latters unique feature of a Wulff construction of nearly 100% exposed (101) facets are probably responsible for the enhanced photoelectrical performance. In particular, we explore the possibility of the low surface area and exposed {101} facets as an efficient light scattering layer of DSSCs. Our work suggests that anatase $TiO_{2}$ mesocrystals with the Wulff construction is a promising candidate as a superior scattering material for high-performance DSSCs.
ISSN	14779226
Issue Number	12
Journal	Dalton Trans.
Volume Number	43
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2014-03-28
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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