RT Journal Article
T1 Spectroscopic study of Cu2/Cu+ doubly doped and highly transmitting glasses for solar spectral transformation
A1 Gómez, Susana
A1 Urra, Iñigo
A1 Valiente, Rafael
A1 Rodríguez, Fernando
AB This work investigates the formation of photoluminescence (PL) centres in high-transmission glasses (HTG) doped with Cu2O and their capability to transform the solar spectrum by absorption/emission via upconversion, downconversion and Stokes-shifted PL into a more efficient spectrum for photovoltaic applications. Both the green PL Cu and the non-PL Cu2 centres are formed in HTG, although their relative concentration depends on the thermal treatment and the presence of other codopants. Given that the absorption spectrum of Cu lies around the HTG band gap, measurement of the absorption coefficient α(λ) for these absorption bands is not easy due to corrections between the reflection coefficient and chromatic dispersion. We present a procedure, named two-thickness method, to extract the actual absorption coefficient for the spectrum of each formed centre. In addition it provides the relative Cu/Cu2 concentration as well as their absolute values. Analysis of the spectra also provides information on the absorption cross section, transition energy and bandwidth of each band, the knowledge of which is essential to check the suitability of such centres for photovoltaic applications in silicon solar cells.
SN 0927-0248
YR 2011
FD 2011-08
LK https://hdl.handle.net/11556/3940
UL https://hdl.handle.net/11556/3940
LA eng
NO Gómez , S , Urra , I , Valiente , R & Rodríguez , F 2011 , ' Spectroscopic study of Cu 2 /Cu + doubly doped and highly transmitting glasses for solar spectral transformation ' , Solar Energy Materials and Solar Cells , vol. 95 , no. 8 , pp. 2018-2022 . https://doi.org/10.1016/j.solmat.2010.07.022
NO This work has been done within the collaborative research framework in photovoltaic glasses with the Research and Innovation Centre (CIDEMCO) in Azpeitia. Financial support from the Spanish Ministerio de Investigación, former Ministerio de Fomento (Project no. C81/2006 ) is acknowledged.
DS TECNALIA Publications
RD 31 jul 2024