Facile synthesis of carbon dot-Au nanoraspberries and their application as high-performance counter electrodes in quantum dot-sensitized solar cells

被引：66

作者：

Van-Duong Dao ^{[1
]}

Kim, Poeun ^{[2
,5
]}

Baek, Seunghyeon ^{[3
]}

Larina, Liudmila L. ^{[1
,4
]}

Yong, Kijung ^{[3
]}

Ryoo, Ryong ^{[2
,5
]}

Ko, Seung Hyeon ^{[5
]}

Choi, Ho-Suk ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Chem Engn, Taejon 305764, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea

[4] Russian Acad Sci, Inst Biochem Phys, Dept Solar Photovolta, Moscow 117901, Russia

[5] Inst for Basic Sci Korea, Ctr Nanomat & Chem React, Taejon 305701, South Korea

来源：

CARBON | 2016年 / 96卷

基金：

新加坡国家研究基金会;

关键词：

NANOPARTICLES; EFFICIENCY;

D O I：

10.1016/j.carbon.2015.09.023

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：

Carbon dot-Au nanoraspberries (Cdot-Au NRs) were synthesized by a simple one-pot process using Cdots as initiators to direct the dendritic growth of Au via room temperature chemical reduction of HAuCl4 by formic acid. We evaluated the resulting Cdot-Au NR as a counter electrode material for ZnO nanowire/CdS/CdSe quantum dot-sensitized solar cells (QDSCs). The counter electrode employing Cdot-Au NRs exhibited higher electrocatalytic activity, lower charger-transfer resistance, and larger exchange current density than commonly used Au-sputtered counter electrodes. The power conversion efficiency of the cell was improved to 5.4%, in comparison to efficiencies of 3.6% and 0.18% shown by cells employing Au-sputtered and Cdot counter electrodes, respectively. These features render Cdot-Au NRs as highly promising counter electrode materials for QDSCs. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：139 / 144

页数：6

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