Luminescent (Er,Ho)2O3 thin films by ALD to enhance the performance of silicon solar cells

Amr Ghazy, Muhammad Safdar, Mika Lastusaari, Arto Aho, Antti Tukiainen, Hele Savin, Mircea Guina, Maarit Karppinen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)


We have fabricated luminescent (Er,Ho)2O3 thin films by atomic layer deposition (ALD) and studied their capability to enhance the performance of state-of-the-art single-junction c-Si bifacial solar cells. The films convert IR photons (e.g. 1523 nm) by three- and two-photon upconversion process to emit visible-light in the 400–700 nm range. When the films were coupled with solar cells, ~3% improvement in the short-circuit current density (620 ± 5 to 638 ± 5 mAcm−2) was recorded under a simulated solar excitation equivalent to 16 suns. These findings highlight a potential of ALD for the design and fabrication of luminescent coatings for practical solar cell devices.

Original languageEnglish
Article number110787
Number of pages5
JournalSolar Energy Materials and Solar Cells
Publication statusPublished - Jan 2021
MoE publication typeA1 Journal article-refereed


  • Atomic layer deposition
  • c-Si solar cell
  • Luminescence
  • Photonics
  • Upconversion


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