Energy level alignment in TiO2/metal sulfide/polymer interfaces for solar cell applications

被引：11

作者：

Lindblad, Rebecka ^{[1
]}

Cappel, Ute B. ^{[2
]}

O'Mahony, Flannan T. F. ^{[2
]}

Siegbahn, Hans ^{[1
]}

Johansson, Erik M. J. ^{[3
]}

Haque, Saif A. ^{[2
]}

Rensmo, Hakan ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron Mol & Condensed Matter Phys, SE-75120 Uppsala, Sweden

[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem, Ctr Plast Elect, London SW7 2AZ, England

[3] Uppsala Univ, Dept Chem, SE-75105 Uppsala, Sweden

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 32期

基金：

英国工程与自然科学研究理事会; 瑞典研究理事会;

关键词：

RAY PHOTOELECTRON-SPECTRA; SOLID-STATE; ELECTRONIC-STRUCTURE; CHARGE-TRANSFER; OPTICAL-PROPERTIES; QUANTUM DOTS; METAL; SB2S3; FILMS; BI2S3;

D O I：

10.1039/c4cp01581a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Semiconductor sensitized solar cell interfaces have been studied with photoelectron spectroscopy to understand the interfacial electronic structures. In particular, the experimental energy level alignment has been determined for complete TiO2/metal sulfide/polymer interfaces. For the metal sulfides CdS, Sb2S3 and Bi2S3 deposited from single source metal xanthate precursors, it was shown that both driving forces for electron injection into TiO2 and hole transfer to the polymer decrease for narrower bandgaps. The energy level alignment results were used in the discussion of the function of solar cells with the same metal sulfides as light absorbers. For example Sb2S3 showed the most favourable energy level alignment with 0.3 eV driving force for electron injection and 0.4 eV driving force for hole transfer and also the most efficient solar cells due to high photocurrent generation. The energy level alignment of the TiO2/Bi2S3 interface on the other hand showed no driving force for electron injection to TiO2, and the performance of the corresponding solar cell was very low.

引用

页码：17099 / 17107

页数：9

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