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Economical Perovskite Solar Cell Enabled by Triple Cost-Reduction Strategies.

Kanokwan Choodam1,2, Nattawut Kamjam1,2, Noppawit Sukpan1,2

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Summary

Perovskite solar cells (PSCs) offer a cost-effective solution for indoor photovoltaics. New strategies like dual absorbers and spray-coating enable PSCs to power IoT devices efficiently and affordably.

Keywords:
carbon electrodehole transport layer freeindoor perovskite solar cellpolyethylene glycol passivationspray coating

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Area of Science:

  • Materials Science
  • Renewable Energy

Background:

  • Perovskite solar cells (PSCs) show high efficiency for indoor energy harvesting.
  • Cost-effective manufacturing is key for widespread adoption in Internet of Things (IoT) devices.

Purpose of the Study:

  • To explore strategies for reducing the cost of perovskite materials (PSK) for indoor photovoltaics.
  • To enable PSCs as viable power sources for indoor IoT applications.

Main Methods:

  • Utilized a dual perovskite absorber layer (PSK1/polyethylene glycol (PEG)/PSK2) to replace absorber and hole transport layers.
  • Employed spray-coating for perovskite deposition under ambient conditions (45%-65% RH).
  • Replaced traditional metal electrodes with cost-effective carbon electrodes.

Main Results:

  • The dual absorber layer and PEG interlayer improved charge transport and defect passivation.
  • Spray-coating minimized solution waste, enhancing large-scale production feasibility.
  • The carbon-based PSCs achieved a low material cost of $11.98 m-2 and m-LCOE-i of 1.54 ¢ Wh-1.

Conclusions:

  • The developed PSCs demonstrate enhanced commercial viability for indoor energy harvesting.
  • Connected PSCs successfully powered IoT devices for over a month under typical indoor lighting conditions.
  • These advancements position PSCs as a promising technology for sustainable indoor power solutions.