Manipulating the molecular structure of PEDOT chains through controlling the viscosity of PEDOT:PSS solutions to improve the photovoltaic performance of CH3NH3PbI3 solar cells

被引：27

作者：

Chang, Sheng Hsiung ^{[1
,2
]}

Chen, Wei-Nien ^{[1
,2
]}

Chen, Cheng-Chiang ^{[1
]}

Yeh, Shih-Chieh ^{[3
]}

Cheng, Hsin-Ming ^{[4
]}

Tseng, Zong-Liang ^{[5
]}

Chen, Lung-Chien ^{[5
]}

Chiu, Kuo Yuan ^{[6
]}

Wu, Wen-Ti ^{[3
]}

Chen, Chin-Ti ^{[3
]}

Chen, Sheng-Hui ^{[2
]}

Wu, Chun-Guey ^{[1
,7
]}

机构：

[1] Natl Cent Univ, Res Ctr New Generat Photovolta, Taoyuan 32001, Taiwan

[2] Natl Cent Univ, Deaprtment Opt & Photon, Taoyuan 32001, Taiwan

[3] Acad Sinica, Inst Chem, Taipei 11529, Taiwan

[4] Ind Technol Res Inst, Mat & Chem Res Labs, Hsinchu 31040, Taiwan

[5] Natl Taipei Univ Technol, Dept Electroopt Engn, Taipei 10608, Taiwan

[6] Natl Chi Nan Univ, Dept Appl Chem, Nantou 545, Taiwan

[7] Natl Cent Univ, Dept Chem, Taoyuan 32001, Taiwan

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2017年 / 161卷

关键词：

PEDOT:PSS; Surface properties; CH3NH3PbI3; Energy transfer; Photovoltaics; ABSORBER BASED PHOTOVOLTAICS; WORK FUNCTION; THIN-FILM; CONDUCTIVITY; EFFICIENCY; SOLVENT; LAYER; MORPHOLOGY; ELECTRODE; DEVICES;

D O I：

10.1016/j.solmat.2016.11.020

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A series of alcohols (methanol, ethanol and isopropyl alcohol) were added to poly(3,4-ethylenedioxythiophene): (polystyrene sulfonate) (PEDOT: PSS) aqueous solutions in order to manipulate the molecular structure of the PEDOT chains in PEDOT: PSS hole transporting materials (HTMs) and thus to improve the power conversion efficiency of CH3NH3PbI3 based solar cells. The structural and electronic characteristics of the resultant PEDOT: PSS HTMs were analyzed using atomic-force microscopy, contact angle measurement, Raman scattering spectrometry and photoelectron spectrometry. The properties of the PEDOT: PSS thin films could be controlled by tuning the viscosity of the PEDOT: PSS solutions. High viscosity PEDOT: PSS solutions resulted in linear structured PEDOT chains, which increased the work function of the PEDOT: PSS HTMs thereby improving the open-circuit voltage of the CH3NH3PbI3 solar cells. The surface roughness and surface free energy of the PEDOT: PSS HTMs influence the structural properties of CH3NH3PbI3 thin films, which determines the exciton dissociation at the CH3NH3PbI3/PEDOT: PSS interface (short-circuit current density) and the carrier recombination at the CH3NH3PbI3/[6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) interface (fill factor). In addition, it is predicted that the power conversion efficiency can be further improved by increasing the crystallinity of the CH3NH3PbI3 thin film.

引用

页码：7 / 13

页数：7

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