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Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
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Efficient Nanocrystal Photovoltaics via Blade Coating Active Layer.

Kening Xiao1, Qichuan Huang1, Jia Luo1

  • 1School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.

Nanomaterials (Basel, Switzerland)
|July 2, 2021
PubMed
Summary

This study introduces a novel blade coating technique for fabricating large-area cadmium telluride (CdTe) semiconductor nanocrystal (NC) solar cells under ambient conditions. The developed method demonstrates improved efficiency and remarkable stability, paving the way for industrial applications.

Keywords:
CdTe nanocrystalsblade coatinglarge area fabrication

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Cadmium telluride (CdTe) semiconductor nanocrystal (NC) solar cells offer low-cost solution processing.
  • Fabrication of large-area NC solar cells under ambient conditions remains a challenge.
  • Industrial scalability of NC solar cell technology requires robust and efficient manufacturing methods.

Purpose of the Study:

  • To develop a novel blade coating technique for fabricating large-area CdTe NC solar cells.
  • To optimize deposition parameters for enhanced power conversion efficiency (PCE).
  • To assess the stability and industrial viability of the fabricated NC solar cells.

Main Methods:

  • Utilized a novel blade coating technique to deposit CdTe NC active layers.
  • Fabricated solar cells with varying areas (0.16, 0.3, 0.5 cm²).
  • Optimized deposition parameters and evaluated device performance and stability under ambient conditions.

Main Results:

  • Achieved PCEs of 3.58% (0.16 cm²), 2.82% (0.3 cm²), and 1.93% (0.5 cm²) under optimal conditions.
  • Demonstrated significantly improved PCE compared to conventional spin-coated devices.
  • Observed high device stability with negligible efficiency degradation over 18 days under ambient conditions.
  • Required lower post-treatment temperatures compared to spin-coated devices.

Conclusions:

  • The novel blade coating technique enables the fabrication of large-area CdTe NC solar cells under ambient conditions.
  • Optimized blade coating offers a promising pathway for efficient and stable NC solar cell production.
  • The technique supports low-cost, roll-by-roll, and large-area industrial fabrication of CdTe NC solar cells.