淡江大學機構典藏:Item 987654321/119256
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    Title: Enhancing Water-Splitting Efficiency Using a Zn/Sn-Doped PN Photoelectrode of Pseudocubic α–Fe2O3 Nanoparticles
    Authors: JX, Yang;Meng, Y;CM, Tseng;YK, Huang;TM, Lin;YM, Wang;JP, Deng;HC, Wu;WH, Hung
    Keywords: Pseudocubic α-Fe2O3;Water splitting;p-n junction;Solar energy
    Date: 2020-06-15
    Issue Date: 2020-09-29 12:10:13 (UTC+8)
    Abstract: α-Phase hematite photoelectrodes can split water. This material is nontoxic, inexpensive, and chemically stable; its low energy gap of 2.3 eV absorbs light with wavelengths lower than 550 nm, accounting for approximately 30% of solar energy. Previously, we reported polyhedral pseudocubic α-Fe2O3 nanocrystals using a facile hydrothermal route to increase spatial charge separation, enhancing the photocurrent of photocatalytic activity in the water-splitting process. Here, we propose a p-n junction structure in the photoanode of pseudocubic α-Fe2O3 to improve short carrier diffusion length, which limits its photocatalytic efficiency. We dope Zn on top of an Fe2O3 photoanode to form a layer of p-type semiconductor material; Sn is doped from the FTO substrate to form a layer of n-type semiconductor material. The p-n junction, n-type Fe2O3:Sn and p-type Fe2O3:Zn, increase light absorption and charge separation caused by the internal electric field in the p-n junction.
    Relation: Nanoscale Research Letters 15, 130
    DOI: 10.1186/s11671-020-03362-5
    Appears in Collections:[Graduate Institute & Department of Chemistry] Journal Article

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