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P-N junction01:11

P-N junction

703
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
703

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Flash Infrared Annealing for Perovskite Solar Cell Processing
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Simultaneous Bulk and Surface Defect Passivation for Efficient Inverted Perovskite Solar Cells.

Senlin Tang1, Ying Peng1, Zheng Zhu1

  • 1State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.

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|June 3, 2022
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A new trometamol-induced dual passivation (TIDP) strategy effectively repairs bulk and surface defects in perovskite solar cells (PSCs). This method enhances efficiency from 17.25% to 19.17% and improves thermal stability.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Structural defects in perovskite layers cause nonradiative recombination, limiting perovskite solar cell (PSC) performance.
  • Defect sites in the bulk and on the surface of perovskites are primary sources of efficiency loss.

Purpose of the Study:

  • To develop a dual passivation strategy for simultaneously addressing bulk and surface defects in perovskite materials.
  • To investigate the efficacy of trometamol as both a chemical additive and surface-modification agent for perovskite solar cells.

Main Methods:

  • Trometamol was employed as a chemical additive to reduce ionic defects and enhance perovskite grain size via coordination and hydrogen bonds.
  • Trometamol was utilized as a surface-modification agent to passivate ionic defects on the perovskite surface.
  • The trometamol-induced dual passivation (TIDP) strategy was applied to perovskite solar cells.

Main Results:

  • The TIDP strategy significantly reduced defect sites in the perovskite layer.
  • Perovskite solar cell efficiency was boosted from 17.25% to 19.17%.
  • Optimized thermal stability of the treated perovskite solar cells was observed under inert conditions.

Conclusions:

  • The trometamol-induced dual passivation (TIDP) strategy effectively manages perovskite defects, leading to enhanced photovoltaic properties.
  • This approach facilitates the fabrication of high-performance perovskite solar cells with improved efficiency and stability.
  • Dual passivation is a crucial strategy for advancing perovskite solar cell technology.