Ex Situ CdSe Quantum Dot-Sensitized Solar Cells Employing Inorganic Ligand Exchange To Boost Efficiency

被引：45

作者：

Liu, Feng ^{[1
]}

Zhu, Jun ^{[1
]}

Wei, Junfeng ^{[1
]}

Li, Yi ^{[1
]}

Hu, Linhua ^{[1
]}

Huang, Yang ^{[1
]}

Takuya, Oshima ^{[2
]}

Shen, Qing ^{[2
,3
]}

Toyoda, Taro ^{[2
,3
]}

Zhang, Bing ^{[4
]}

Yao, Jianxi ^{[4
]}

Dai, Songyuan ^{[1
,4
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, Hefei 230031, Anhui, Peoples R China

[2] Univ Electrocommun, Fac Informat & Engn, Dept Engn Sci, Chofu, Tokyo 1828585, Japan

[3] Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama 3320012, Japan

[4] North China Elect Power Univ, Sch Renewable Energy, Beijing 102206, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 01期

基金：

日本科学技术振兴机构; 国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

ULTRAFAST CARRIER DYNAMICS; FREE HETERODYNE-DETECTION; COLLOIDAL NANOCRYSTALS; ELECTRON INJECTION; OPTICAL-ABSORPTION; TIO2; PBS; FILMS; OXIDE; CDTE;

D O I：

10.1021/jp410599q

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：

We present an effective way to boost the as-synthesized CdSe quantum dot-sensitized solar cells (QDSSCs) performance by introducing an inorganic ligand exchange strategy into this traditional system. Inorganic ligand exchange, to the best of our knowledge, is designed for the first time for CdSe-based QDSSCs, and it features low-cost, easy operation, and repeatable process. The route involves the direct deposition of the CdSe quantum dots (QDs), which were initially capped with trioctylphosphine (TOP) ligands onto mesoporous TiO2 nanocrystalline electrodes and followed by a post-treatment of the sensitized photoanode films with sulfur ions (S2-) solution. Here, changes in surface chemical status of CdSe QDs during the inorganic ligand exchange process and the influence of ligand exchange on the electron's ultralfast transfer between nanoparticles were investigated through XPS and femtosecond transient grating techniques,. respectively. With the inorganic ligand passivated CdSe QDs, the QDSSCs exhibited a power conversion efficiency of 3.17% (AM1.5G, 100 mW/cm(2)), 65% higher than that of the organic ligands capped QDSSCs.

引用

页码：214 / 222

页数：9

共 57 条

[1]

Ayuzawa Y., 2010, APPL PHYS LETT, V97

[2] Characterization of photoinduced electron tunneling in gold/SAM/Q-CdSe systems by time-resolved photoelectrochemistry [J].