Dramatic Enhancement of Photoluminescence Quantum Yields for Surface-Engineered Si Nanocrystals within the Solar Spectrum

被引：25

作者：

Svrcek, Vladimir ^{[1
]}

Dohnalova, Katerina ^{[2
]}

Mariotti, Davide ^{[3
]}

Minh Tuan Trinh ^{[2
]}

Limpens, Rens ^{[2
]}

Mitra, Somak ^{[3
]}

Gregorkiewicz, Tom ^{[2
]}

Matsubara, Koiji ^{[1
]}

Kondo, Michio ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Ctr Photovolta, Tsukuba, Ibaraki 3058568, Japan

[2] Van der Waals Zeeman Inst, NL-1098 XH Amsterdam, Netherlands

[3] Univ Ulster, Nanotechnol & Integrated Bioengn Ctr NIBEC, Coleraine BT52 1SA, Londonderry, North Ireland

来源：

ADVANCED FUNCTIONAL MATERIALS | 2013年 / 23卷 / 48期

基金：

爱尔兰科学基金会; 英国工程与自然科学研究理事会;

关键词：

solar cells; nanocrystals; carrier multiplication; semiconductors; MULTIPLE EXCITON GENERATION; SILICON NANOCRYSTALS; CARRIER MULTIPLICATION; PHOTOVOLTAIC APPLICATIONS; LIQUID-MEDIA; DOTS; RECOMBINATION; ABSORPTION; CHEMISTRY; CELLS;

D O I：

10.1002/adfm.201301468

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Substantial improvements of the absolute photoluminescence quantum yield (QY) for surfactant-free silicon nanocrystals (Si-ncs) by atmospheric pressure microplasma 3-dimensional surface engineering are reported. The effect of surface characteristics on carrier multiplication mechanisms is explored using transient induced absorption and photoluminescence QY. Surface engineering of Si-ncs is demonstrated to lead to more than 120 times increase in the absolute QY (from 0.1% up to 12%) within an important spectral range of the solar emission (2.3-3 eV). The Si-ncs QY is shown to be stable when Si-ncs are stored in ethanol at ambient conditions for three months.

引用

页码：6051 / 6058

页数：8

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