We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Detection of Nonradiative Recombination Centers in GaPN (N:0.105%) by Below‐Gap Excitation Light.
- Authors
Ferdous, Sanjida; Kamata, Norihiko; Yagi, Shuhei; Yaguchi, Hiroyuki
- Abstract
Investigation on cascade photo‐excitation via intermediate band (IB) is promising for improving the efficiency of IB‐type solar cells (IBSCs). Increasing nitrogen (N) concentration in GaP changes an ensemble of discrete N–N pair levels to form the IB as well as introducing defect levels acting as nonradiative recombination (NRR) centers. In continuation of detecting NRR centers in GaP1−xNx (x > 0.5%), a study is made for the lower N concentration region of 0.105% to understand an original formation of defect levels and their properties. Elimination of temperature quenching by immersing the sample into liquid nitrogen reveals a distribution of NRR centers inside the forbidden energy gap and the shift of Fermi energy depending on above‐gap excitation (AGE) density. Profound understanding of IB and defects of GaP1−xNx leads to a proper optimization of IBSCs.
- Subjects
SOLAR cell efficiency; FERMI energy; BAND gaps; WAREHOUSES; LIQUID nitrogen; IMMERSION in liquids
- Publication
Physica Status Solidi (B), 2020, Vol 257, Issue 2, pN.PAG
- ISSN
0370-1972
- Publication type
Article
- DOI
10.1002/pssb.201900377