Core/Shell PbSe/PbS QDs TiO2 Heterojunction Solar Cell

被引：103

作者：

Etgar, Lioz ^{[1
,2
]}

Yanover, Diana ^{[3
]}

Capek, Richard Karel ^{[3
]}

Vaxenburg, Roman ^{[3
]}

Xue, Zhaosheng ^{[4
]}

Liu, Bin ^{[4
]}

Nazeeruddin, Mohammad Khaja ^{[2
]}

Lifshitz, Efrat ^{[3
]}

Graetzel, Michael ^{[2
]}

机构：

[1] Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel

[2] Ecole Polytech Fed Lausanne, Dept Sci & Chem Engn, CH-1015 Lausanne, Switzerland

[3] Technion Israel Inst Technol, Grand Technion Energy Program, Russell Berrie Nanotechnol Inst, Schulich Fac Chem,Solid State Inst, IL-32000 Haifa, Israel

[4] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117548, Singapore

来源：

ADVANCED FUNCTIONAL MATERIALS | 2013年 / 23卷 / 21期

关键词：

core shell; PbSe; PbS; heterojunction solar cell; stability; wave function; OPTICAL-PROPERTIES; QUANTUM DOTS; NANOCRYSTALS; PBS; EFFICIENCY; ENERGY;

D O I：

10.1002/adfm.201202322

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO2 nanosheet film with (001) exposed facets. Theoretical calculations show that the carriers in PbSe/PbS quasi type-II QDs are delocalized over the entire core/shell structure, which results in better QD film conductivity compared to PbSe QDs. Moreover, PbS shell permits better stability and facile electron injection from the QDs to the TiO2 nanosheets. To complete the electrical circuit of the solar cell, a Au film is evaporated as a back contact on top of the QDs. This PbSe/PbS QD/TiO2 heterojunction solar cell produces a light to electric power conversion efficiency () of 4% with short circuit photocurrent (Jsc) of 17.3 mA/cm2. This report demonstrates highly efficient core/shell near infrared QDs in a QD/TiO2 heterojunction solar cell.

引用

页码：2736 / 2741

页数：6

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