Optical and Electrical Transport Evaluations of n‑Type Iron Pyrite Single Crystals
| Autor: | Muhammad Monirul Islam, Shunsuke Uchiyama, Takeaki Sakurai, Yasuaki Ishikawa, Ryosuke Sato, Ryoji Katsube, Yoshitaro Nose, Hideaki Adachi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Flux method
Materials science General Chemical Engineering Energy conversion efficiency Oxide General Chemistry engineering.material Thermal conduction Electron transport chain Article chemistry.chemical_compound Chemistry chemistry Chemical physics Phase (matter) engineering Pyrite Spectroscopy QD1-999 |
| Zdroj: | ACS Omega, Vol 6, Iss 46, Pp 31358-31365 (2021) ACS Omega |
| ISSN: | 2470-1343 |
| Popis: | Iron pyrite [cubic FeS2 (cFeS2)] is considered as an earth-abundant and low-cost thin-film photovoltaic material. However, the conversion efficiency of cFeS2-based solar cells remains below 3%. To elucidate this limitation, we evaluate the optical and electrical characteristics of cFeS2 single crystals that are grown using the flux method, thus providing us an understanding of the electron transport behavior of cFeS2 single crystals. The oxide layer on the surface of cFeS2, which can possibly have an influence on the electrical characteristics of cFeS2, is removed prior to characterization via optical spectroscopy and electrical transport measurement. The optical property of cFeS2 was found to have both indirect and direct transitions. We also observed the presence of a band tail below the conduction band. The obtained electrical transport behavior indicates that cFeS2 bulk exhibits a high defect density and a disordered phase, thus leading to the hopping conduction mechanism. Our results will pave the way for the development of photovoltaic applications with iron pyrite. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|