The Formation of Ti-H Species at Interface Is Lethal to the Efficiency of TiO2-Based Dye-Sensitized Devices

	The Formation of Ti-H Species at Interface Is Lethal to the Efficiency of TiO2-Based Dye-Sensitized Devices
	Yan, Yan 1,2,3; Shi, Weidong 3; Yuan, Zhen 1,2; He, Shenggui 1,2; Li, Dongmei 4; Meng, Qingbo 4; Ji, Hongwei 1,2; Chen, Chuncheng 1,2; Ma, Wanhong 1,2; Zhae, Jincai 1,2
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2017-02-08
卷号	139 期号:5 页码:2083-2089
英文摘要	TiO2-based dye-sensitization cycle is one of the basic strategies for the development of solar energy applications. Although the power conversion efficiency (PCE) of dye-sensitized devices has been improved through constant attempts, the intrinsically fatal factor that leads to the complete failure of the PCE of TiO2-mediated dye-sensitized devices has not yet been determined. Here, by using isotopically labeled MAS-H-1 NMR, ATR-FTIR spectroscopy (separate H/D and Ti-48/Ti-49 experiments), and ESR, we revealed that the accumulative formation of Ti-H species on the TiO2 surface is the intrinsic cause of the PCE failure of TiO2-based dye-sensitization devices. Such a Ti-H species is generated from the reduction of hydrogen ions (mostly released from dye carboxyl groups or organic electrolyte) accompanied by electron injection on the surface of TiO2, which deteriorates the PCE mainly by reducing the electrical conductivity of the TiO2 (by a maximum of similar to 80%) and the hydrophilic nature of the TiO2 surface (contact angle increased).
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38132]
专题	化学研究所_光化学实验室
作者单位	1.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China 3.Jiangsu Univ, Sch Chem & Chem Engn, 301 Xuefu Rd, Zhenjiang 212013, Peoples R China 4.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing Key Lab New Energy Mat & Devices, Key Lab Renewable Energy CAS,Inst Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yan, Yan,Shi, Weidong,Yuan, Zhen,et al. The Formation of Ti-H Species at Interface Is Lethal to the Efficiency of TiO2-Based Dye-Sensitized Devices[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(5):2083-2089.
APA	Yan, Yan.,Shi, Weidong.,Yuan, Zhen.,He, Shenggui.,Li, Dongmei.,...&Zhae, Jincai.(2017).The Formation of Ti-H Species at Interface Is Lethal to the Efficiency of TiO2-Based Dye-Sensitized Devices.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(5),2083-2089.
MLA	Yan, Yan,et al."The Formation of Ti-H Species at Interface Is Lethal to the Efficiency of TiO2-Based Dye-Sensitized Devices".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.5(2017):2083-2089.