Case ID: M16-121P

Published: 2017-01-24 11:16:28

Last Updated: 1670404515


Inventor(s)

Stanislau Herasimenka

Technology categories

Advanced Materials/NanotechnologyEnergy & PowerPhysical ScienceSemiconductor DevicesSemiconductors, Materials & Processes

Technology keywords

Energy
Fuel Cells
Materials and Electronics
Mechanical and Manufacturing


Licensing Contacts

Physical Sciences Team

Transparent Conductive Oxide

Silicon heterojunction (SHJ) technology can provide high solar cell efficiency and low cost in high volume manufacturing. Transparent conductive oxides (TCOs), a component in SHJ cells, can help achieve good conductivity and electrical contact with metals for transferring current. However, optimizing TCO layers in SHJ solar cells requires a tradeoff between losses arising from optical, recombination, and series resistance effects. Therefore, there is a need to design an optimal SHJ configuration that minimizes losses in TCOs and maintains electrical properties.

Researchers at ASU have developed a new method to improve the optical response of SHJ cells by using ITO/SiOx:H stacks and developed a way to integrate the stacks with Cu plating. The technology comprises a SiOx:H film on the front of the cell to serve as a second antireflection (AR) coating to allow thinner TCOs that absorb less light. Meanwhile, hydrogen treatment from SiOx:H from post-deposition annealing maintains the conductivity of the thin TCO. At the rear side of the cell, a thin-ITO/SiOx:H/Ag film serves as a superior rear mirror compared to conventional films. Overall, the researchers developed a method to reduce optical losses in TCOs without compromising conductivity.

Potential Applications

  • Silicon heterojunction solar cells
  • Transparent conductive oxides
  • Thin-film optoelectronics

Benefits and Advantages

  • Effective – The method uses front and back side films that give excellent front-side conductivity and superior rear-side reflection, attributing to a high efficiency
  • Innovative – The design gives a way to incorporate the ITO/SiOx:H stacks with copper plating and using ITO/SiNx/SiOx triple layer AR coatings, leading to improved performance and reduced optical losses

For more information about the inventor(s) and their research, please see:

Dr. Stanislau Herasimenka's directory webpage