Synthesis, structure, and photovoltaic property of a nanocrystalline 2H perovskite-type novel sensitizer (CH3CH2NH3)PbI3

被引：233

作者：

Im, Jeong-Hyeok ^{[1
,2
]}

Chung, Jaehoon ^{[3
]}

Kim, Seung-Joo ^{[3
]}

Park, Nam-Gyu ^{[1
,2
]}

机构：

[1] Sungkyunkwan Univ, Sch Chem Engn, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea

[3] Ajou Univ, Dept Chem, Div Energy Syst Res, Suwon 443749, South Korea

来源：

NANOSCALE RESEARCH LETTERS | 2012年 / 7卷

基金：

新加坡国家研究基金会;

关键词：

(CH3CH2NH3)PbI3; 2H perovskite; Dye-sensitized solar cell; Nanodot; Sensitizer; QUANTUM DOTS; SOLAR-CELLS; SEMICONDUCTOR NANOCRYSTALS;

D O I：

10.1186/1556-276X-7-353

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new nanocrystalline sensitizer with the chemical formula (CH3CH2NH3)PbI3 is synthesized by reacting ethylammonium iodide with lead iodide, and its crystal structure and photovoltaic property are investigated. X-ray diffraction analysis confirms orthorhombic crystal phase with a = 8.7419(2) , b = 8.14745(10) , and c = 30.3096(6) , which can be described as 2 H perovskite structure. Ultraviolet photoelectron spectroscopy and UV-visible spectroscopy determine the valence band position at 5.6 eV versus vacuum and the optical bandgap of ca. 2.2 eV. A spin coating of the CH3CH2NH3I and PbI2 mixed solution on a TiO2 film yields ca. 1.8-nm-diameter (CH3CH2NH3)PbI3 dots on the TiO2 surface. The (CH3CH2NH3)PbI3-sensitized solar cell with iodide-based redox electrolyte demonstrates the conversion efficiency of 2.4% under AM 1.5 G one sun (100 mW/cm(2)) illumination.

引用

页数：7

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