Naslov
Down-converter based on rare earth doped fluoride glass to improve Si-based solar cell efficiency

Autori
Alombert-Goget, Guillaume ; Ristic, Davor ; Chiasera, Alessandro ; Varas, Stefano ; Ferrari, Maurizio ; Righini, Giancarlo Cesare ; Dieudonne, B. ; Boulard, Brigitte

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of SPIE vol. 8069, Integrated Photonics: Materials, Devices, and Applications / Serpenguzel, Ali ; Righini, Giancarlo Cesare ; Leipertz, Alfred - Bellingham (WA) : SPIE, 2011, 80690N-1

ISBN
9780819486585

Skup
SPIE Microtechnologies

Mjesto i datum
Prag, Češka Republika, 18.04.2011. - 20.04.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Quantum cutting; Down-conversion; Rare earth; Fluoride glass; Energy transfer.

Sažetak
The solar cells efficiency may be improved by better exploitation of the solar spectrum, making use of the downconversion mechanism, where one high energy photon is cut into two low energy photons [1]. The choice of the matrix is a crucial point to obtain an efficient down-conversion process with rare-earth ions. When energy transfer between rare earth ions is used to activate this process, high emission and absorption cross sections as well as low cutoff phonon energy are mandatory. A low phonon energy host lattice reduces non-radiative transition rates leading to the increase of the luminescent quantum yield and of the energy transfer efficiency. Recently, some studies have demonstrated that fluoride and oxyfluoride glasses may be valid systems to support an effective quantum cutting process [2-4]. As a fluoride material, the relatively low phonon energy, around 600cm-1, of the ZLAG (70ZrF4 23.5LaF3 0.5AlF3 6GaF3 in mol%) glass makes it highly suitable for applications involving energy transfers. In this study, attention is focused on the assessment of the energy transfer efficiency between the Pr3+ and Yb3+ ions in bulk fluoride glasses ZLAG.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA