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Title: Tuning back contact property via artificial interface dipoles in Si/organic hybrid solar cells

Abstract

Back contact property plays a key role in the charge collection efficiency of c-Si/poly(3,4-ethylthiophene):poly(styrenesulfonate) hybrid solar cells (Si-HSCs), as an alternative for the high-efficiency and low-cost photovoltaic devices. In this letter, we utilize the water soluble poly (ethylene oxide) (PEO) to modify the Al/Si interface to be an Ohmic contact via interface dipole tuning, decreasing the work function of the Al film. This Ohmic contact improves the electron collection efficiency of the rear electrode, increasing the short circuit current density (J{sub sc}). Furthermore, the interface dipoles make the band bending downward to increase the total barrier height of built-in electric field of the solar cell, enhancing the open circuit voltage (V{sub oc}). The PEO solar cell exhibits an excellent performance, 12.29% power conversion efficiency, a 25.28% increase from the reference solar cell without a PEO interlayer. The simple and water soluble method as a promising alternative is used to develop the interfacial contact quality of the rear electrode for the high photovoltaic performance of Si-HSCs.

Authors:
 [1];  [2]; ; ; ; ; ;  [1]
  1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22594452
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 4; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BENDING; CHARGE COLLECTION; CURRENT DENSITY; DIPOLES; EFFICIENCY; ELECTRIC FIELDS; ELECTRIC POTENTIAL; ELECTRICAL FAULTS; ELECTRODES; ELECTRONS; ETHYLENE; FILMS; INTERFACES; PHOTOVOLTAIC EFFECT; POLYETHYLENE GLYCOLS; SILICON SOLAR CELLS; TUNING; WATER; WORK FUNCTIONS

Citation Formats

Wang, Dan, Department of Physics and Institute of Solid-state electronics physical, Ningbo University, Ningbo 315211, Sheng, Jiang, E-mail: shengjiang@nimte.ac.cn, Wu, Sudong, Zhu, Juye, Chen, Shaojie, Gao, Pingqi, and Ye, Jichun, E-mail: jichun.ye@nimte.ac.cn. Tuning back contact property via artificial interface dipoles in Si/organic hybrid solar cells. United States: N. p., 2016. Web. doi:10.1063/1.4959839.
Wang, Dan, Department of Physics and Institute of Solid-state electronics physical, Ningbo University, Ningbo 315211, Sheng, Jiang, E-mail: shengjiang@nimte.ac.cn, Wu, Sudong, Zhu, Juye, Chen, Shaojie, Gao, Pingqi, & Ye, Jichun, E-mail: jichun.ye@nimte.ac.cn. Tuning back contact property via artificial interface dipoles in Si/organic hybrid solar cells. United States. doi:10.1063/1.4959839.
Wang, Dan, Department of Physics and Institute of Solid-state electronics physical, Ningbo University, Ningbo 315211, Sheng, Jiang, E-mail: shengjiang@nimte.ac.cn, Wu, Sudong, Zhu, Juye, Chen, Shaojie, Gao, Pingqi, and Ye, Jichun, E-mail: jichun.ye@nimte.ac.cn. Mon . "Tuning back contact property via artificial interface dipoles in Si/organic hybrid solar cells". United States. doi:10.1063/1.4959839.
@article{osti_22594452,
title = {Tuning back contact property via artificial interface dipoles in Si/organic hybrid solar cells},
author = {Wang, Dan and Department of Physics and Institute of Solid-state electronics physical, Ningbo University, Ningbo 315211 and Sheng, Jiang, E-mail: shengjiang@nimte.ac.cn and Wu, Sudong and Zhu, Juye and Chen, Shaojie and Gao, Pingqi and Ye, Jichun, E-mail: jichun.ye@nimte.ac.cn},
abstractNote = {Back contact property plays a key role in the charge collection efficiency of c-Si/poly(3,4-ethylthiophene):poly(styrenesulfonate) hybrid solar cells (Si-HSCs), as an alternative for the high-efficiency and low-cost photovoltaic devices. In this letter, we utilize the water soluble poly (ethylene oxide) (PEO) to modify the Al/Si interface to be an Ohmic contact via interface dipole tuning, decreasing the work function of the Al film. This Ohmic contact improves the electron collection efficiency of the rear electrode, increasing the short circuit current density (J{sub sc}). Furthermore, the interface dipoles make the band bending downward to increase the total barrier height of built-in electric field of the solar cell, enhancing the open circuit voltage (V{sub oc}). The PEO solar cell exhibits an excellent performance, 12.29% power conversion efficiency, a 25.28% increase from the reference solar cell without a PEO interlayer. The simple and water soluble method as a promising alternative is used to develop the interfacial contact quality of the rear electrode for the high photovoltaic performance of Si-HSCs.},
doi = {10.1063/1.4959839},
journal = {Applied Physics Letters},
number = 4,
volume = 109,
place = {United States},
year = {Mon Jul 25 00:00:00 EDT 2016},
month = {Mon Jul 25 00:00:00 EDT 2016}
}