Impact of the Growth Conditions of Colloidal PbS Nanocrystals on Photovoltaic Device Performance

被引：54

作者：

Fu, Huiying ^{[1
]}

Tsang, Sai-Wing ^{[1
]}

Zhang, Yanguang ^{[1
]}

Ouyang, Jianying ^{[2
]}

Lu, Jianping ^{[1
]}

Yu, Kui ^{[2
]}

Tao, Ye ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

[2] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada

来源：

CHEMISTRY OF MATERIALS | 2011年 / 23卷 / 07期

关键词：

PbS nanocrystals; photovoltaic devices; nanocrystal growth rate; transient photocurrent measurement; SEMICONDUCTOR NANOCRYSTALS; INFRARED PHOTOVOLTAICS; QUANTUM DOTS; SOLAR-CELLS; NANOPARTICLES;

D O I：

10.1021/cm200051j

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：

Here, we present a detailed investigation on the influence of the growth conditions of colloidal lead sulfide (PbS) nanocrystals on photovoltaic device performance. The PbS nanocrystals were synthesized in a noncoordinating solvent, 1-octadecene, using oleic acid (OA) as the ligand. It was found that both the feeding molar ratio of OA to Pb and the reactant concentration were critical for controlling the growth rate of nanocrystals. Transient photocurrent (TPC) measurements revealed reduced trap density in thin films using the slow-growth nanocrystals. Solar cells based on the slow-growth nanocrystals showed a high power conversion efficiency (PCE) of 3.8% under simulated Air Mass 1.5 Global (AM 1.5G) irradiation (100 mW/cm(2)), a 2-fold increase in PCE, compared to the fast-growth nanocrystals, because of the remarkable improvement in the open-circuit voltage and fill factor in the PV devices.

引用

页码：1805 / 1810

页数：6

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