CdS/CdSe/TiO<sub>2</sub>多级空心微球光阳极中量子点覆盖度的提高

引用本文: 王丽娟, 李琦, 郝彦忠, 申世刚, 徐东升. CdS/CdSe/TiO₂多级空心微球光阳极中量子点覆盖度的提高[J]. 物理化学学报, 2016, 32(4): 983-989. doi: 10.3866/PKU.WHXB201603144 shu

Citation: WANG Li-Juan, LI Qi, HAO Yan-Zhong, SHEN Shi-Gang, XU Dong-Sheng. Improvement of Quantum Dot Coverage of CdS/CdSe/TiO₂ Hierarchical Hollow Sphere Photoanodes[J]. Acta Physico-Chimica Sinica, 2016, 32(4): 983-989. doi: 10.3866/PKU.WHXB201603144 shu

CdS/CdSe/TiO₂多级空心微球光阳极中量子点覆盖度的提高

王丽娟 ^1,2, ,
李琦 ^2, ,
郝彦忠 ^3, ,
申世刚 ^{1,
,} ,
徐东升 ^{2,
,}

1.
1. 河北大学化学与环境科学学院, 河北保定 071002;
2.
2. 北京大学化学与分子工程学院, 北京分子科学国家实验室, 北京 100871;
3.
3. 河北科技大学理学院, 石家庄 050018

通讯作者: 申世刚, 徐东升; 申世刚, 徐东升

基金项目:
国家自然科学基金(21133001, 21303004) (21133001, 21303004)

国家重点基础研究发展规划项目(973) (2013CB932601, 2014CB239303) (973) (2013CB932601, 2014CB239303)

河北省自然科学基金(B2014208062)资助 (B2014208062)

摘要: TiO₂多级空心微球(THHSs)具有高的比表面积、强的光散射效应以及良好的电子传输性质,以此作为光阳极材料,可以显著提升CdS/CdSe敏化太阳能电池(QDSSCs)的性能。但基于化学浴沉积方法获得的这一类电池中量子点在光阳极表面的覆盖度通常不高(50%左右),本文发展了一种基于表面选择性吸附原理的多步沉积方法,选取特定分子(正十二硫醇)限制已有量子点的生长,通过二次沉积成功提高了CdS/CdSe在TiO₂多级空壳微球表面的覆盖度。使用此方法最终得到高达85.4%的覆盖度。结果表明,量子点覆盖度的增加有效提高了电池对太阳光的利用率,使得光电流获得了明显的增加。同时,二氧化钛空白表面积的减小还可以抑制电子和空穴的复合。优化后的电池光电流密度为15.69 mA·cm^-2,填充因子为0.583,电压为0.605 V,最高光电转换效率为5.30%。

关键词:

English

Improvement of Quantum Dot Coverage of CdS/CdSe/TiO₂ Hierarchical Hollow Sphere Photoanodes

1.
1. College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei Province, P. R. China;
2.
2. Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China;
3.
3. College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, P. R. China

Corresponding author: 申世刚, 徐东升; 申世刚, 徐东升

Received Date: 26 February 2016
Available Online: 14 March 2016
Fund Project:
国家自然科学基金(21133001, 21303004)

国家重点基础研究发展规划项目(973) (2013CB932601, 2014CB239303)

河北省自然科学基金(B2014208062)资助

Abstract: TiO₂ hierarchical hollow spheres (THHSs) are considered an ideal material for photoanodes of CdS/CdSe quantum dot-sensitized solar cells (QDSSCs) because of their high specific surface area, strong light scattering effect, and excellent charge transfer capability. However, in a typical CdS/CdSe quantum dot deposition process, chemical bath deposition, the coverage of the CdS/CdSe quantum dots is relatively low (~50%). According to the different surface properties of CdS/CdSe quantum dots and TiO₂, we have developed a novel route to increase the quantum dot coverage while preventing their aggregation. In our method, 1-dodecanethiol was used as a surface protection molecule on the quantum dots. Then, in the secondary chemical bath deposition process, the newly emerged quantum dots grew only on the TiO₂ surface and thus the coverage notably increased. Eventually, the quantum dot coverage reached 85.4%. This method effectively enhanced light utilization and led to an increase in the photocurrent of the QDSSCs. The reduced blank surface of TiO₂ also efficiently suppressed electron-hole recombination. Thus, the photocurrent density was 15.69 mA·cm^-2, the fill factor was 0.583, and the voltage was 0.605 V. As a result, a power conversion efficiency of 5.30% was obtained.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

CdS/CdSe/TiO₂多级空心微球光阳极中量子点覆盖度的提高

通讯作者: 申世刚, 徐东升; 申世刚, 徐东升

English

Improvement of Quantum Dot Coverage of CdS/CdSe/TiO₂ Hierarchical Hollow Sphere Photoanodes

Corresponding author: 申世刚, 徐东升; 申世刚, 徐东升

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CdS/CdSe/TiO2多级空心微球光阳极中量子点覆盖度的提高

通讯作者: 申世刚, 徐东升; 申世刚, 徐东升

English

Improvement of Quantum Dot Coverage of CdS/CdSe/TiO2 Hierarchical Hollow Sphere Photoanodes

Corresponding author: 申世刚, 徐东升; 申世刚, 徐东升

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CdS/CdSe/TiO₂多级空心微球光阳极中量子点覆盖度的提高

Improvement of Quantum Dot Coverage of CdS/CdSe/TiO₂ Hierarchical Hollow Sphere Photoanodes

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