4.5 Article

Ag Alloying and KF Treatment Effects on Low Bandgap CuInSe2 Solar Cells

Journal

IEEE JOURNAL OF PHOTOVOLTAICS
Volume 9, Issue 3, Pages 906-911

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2019.2899962

Keywords

Ag alloying; Cu(In,Ga)Se-2 (CIGS) solar cells; potassium fluoride post-deposition treatment (KF-PDT)

Funding

  1. National Science Foundation (NSF) [1507351]
  2. NSF [1428149]
  3. Division Of Chemistry
  4. Direct For Mathematical & Physical Scien [1428149] Funding Source: National Science Foundation
  5. Div Of Electrical, Commun & Cyber Sys
  6. Directorate For Engineering [1507351] Funding Source: National Science Foundation

Ask authors/readers for more resources

Silver alloying and KF post-deposition treatments are explored as approaches to increase the efficiency of low bandgap CuInSe2 (CIS) solar cells. The KF treatment prevents a loss in V-OC when CIS has a thinner CdS layer, and also increases the carrier concentration of these devices. Compared with CIS devices, Ag alloyed CIS (ACIS) devices have lower efficiencies due to a lower carrier concentration which decreases VOC. When ACIS is exposed to the KF treatment, the resulting devices have reduced VOC and fill factor (FF) compared with untreated devices; however, thinning the CdS layer with KF-treated ACIS improves VOC. ACIS+KF films show an unidentified compound in Raman spectra and the resulting solar cells have a dominant interface recombination mechanism and light-to-dark crossover. An electron microscopy study of the growth and coverage of CdS reveals that KF-treated samples in this study have faster CdS growth and ACIS+KF has complete CdS coverage with less than half of the normal deposition time. Improved coverage of CdS layers on KF-treated samples is also verified by X-ray photoelectron spectroscopy. Finally, using a heat treatment and an anti-reflection layer enables CIS+KF solar cells to obtain a high 16.0% efficiency for CIS with a V-OC = 526 mV and J(SC) = 41.0 mA/cm(2).

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.5
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available