Role of carbon nanodots in defect passivation and photo-sensitization of mesoscopic-TiO2 for perovskite solar cells

被引：38

作者：

Sidhik, Siraj ^{[1
]}

Velusamy, Jayaramakrishnan ^{[1
]}

De la Rosa, Elder ^{[1
,3
]}

Alfonso Perez-Garcia, Sergio ^{[2
]}

Ramos-Ortiz, Gabriel ^{[1
]}

Lopez-Luke, Tzarara ^{[1
]}

机构：

[1] Ctr Invest Opt, AP 1-948, Leon 37150, Gto, Mexico

[2] Ctr Invest Mat Avanzados SC, Unidad Monterrey PIIT, Apodaca 66628, Nuevo Leon, Mexico

[3] Univ De La Salle Bajio, Campus Campestre, Leon 37150, Gto, Mexico

来源：

CARBON | 2019年 / 146卷

关键词：

ELECTRON TRANSPORTING LAYER; PERFORMANCE ENHANCEMENT; TIO2; DOTS;

D O I：

10.1016/j.carbon.2019.01.105

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：

In this work, a recently developed carbon nanodots (CnDs) were introduced in the mesoscopic TiO2 to form a TiO2: CnDs composite, to be used as an electrode in CH3NH3PbI3 based perovskite devices. It resulted the improvement in morphology of perovskite film and induced a carbon-doping passivating the oxygen defects. In addition, the presence of carbon dots enhanced the charge carrier mobility of TiO2 and provided extra photo-generation ability to the perovskite device due to its absorbing nature. The improved morphology, carbon-doping, photogeneration ability and the improved charge transfer characteristics with the introduction of carbon dots was verified by the scanning electron microscopy (SEM), atomic force microscopy (AFM), X-Ray photoelectron spectroscopy (XPS), UV-visible absorption, X-ray diffraction, space charge limited current (SCLC) measurement, photoluminescence (PL), electrochemical impedance spectroscopy (EIS), current leakage and open circuit photovoltage decay (OCPD) measurements. An optimized concentration of CnDs (3 wt%) within the TiO2 resulted in a maximum power conversion efficiency of 19.45% with negligible hysteresis, which is 16% higher than the device with pristine TiO2. (c) 2019 Published by Elsevier Ltd.

引用

页码：388 / 398

页数：11

共 58 条

[31] Recent progress in carbon quantum dots: synthesis, properties and applications in photocatalysis [J].

Wang, Ru ;

Lu, Kang-Qiang ;

Tang, Zi-Rong ;

Xu, Yi-Jun .

JOURNAL OF MATERIALS CHEMISTRY A, 2017, 5 (08) :3717-3734

[32] Enhanced short-circuit current density of perovskite solar cells using Zn-doped TiO2 as electron transport layer [J].

Wu, Ming-Chung ;

Chan, Shun-Hsiang ;

Jao, Meng-Huan ;

Su, Wei-Fang .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2016, 157 :447-453

[33]

Zhang X., 2017, IOP Conference Series: Materials Science and Engineering

[34] Self-Doped and Crown-Ether Functionalized Fullerene as Cathode Buffer Layer for Highly-Efficient Inverted Polymer Solar Cells [J].

Zhao, Fuwen ;

Wang, Zhen ;

Zhang, Jianqi ;

Zhu, Xiangwei ;

Zhang, Yajie ;

Fang, Jin ;

Deng, Dan ;

Wei, Zhixiang ;

Li, Yongfang ;

Jiang, Li ;

Wang, Chunru .

ADVANCED ENERGY MATERIALS, 2016, 6 (09)

[35] Interface engineering of highly efficient perovskite solar cells [J].

Zhou, Huanping ;

Chen, Qi ;

Li, Gang ;

Luo, Song ;

Song, Tze-bing ;

Duan, Hsin-Sheng ;

Hong, Ziruo ;

You, Jingbi ;

Liu, Yongsheng ;

Yang, Yang .

SCIENCE, 2014, 345 (6196) :542-546

[36]

2011, MICROPOR MESOPOR MAT, V142, P276, DOI DOI 10.1016/J.MICROMESO.2010.12.010

[37]

2018, NAT ENERGY, V3, P682, DOI DOI 10.1038/S41560-018-0200-6

[38]

2015, PHYS CHEM CHEM PHYS, V17, P1859, DOI DOI 10.1039/C5CP02541A

[39]

2014, J AM CHEM SOC, V136, P8094, DOI DOI 10.1021/JA5033259

[40]

2015, J AM CHEM SOC, V137, P8696, DOI DOI 10.1021/JACS.5B04930

← 1 2 3 4 5 6 →