In an attempt to take full advantage of near-infrared part of the solar spectrum, Gd2(MoO4)3:Er3+ nanophosphors have been proposed as potential luminescent materials to enhance the response of the silicon solar-cell. Upon excitation with low-energy near-infrared photons, intense upconverted emissions at 545, 665, 800, and 980 nm, for which energies higher than the bandgap of silicon solar-cell, have been achieved with conversion efficiencies of 0.12%, 0.05%, 0.83%, and 1.35%, respectively. Development of nanophosphors for photovoltaic purposes could open up an approach in achieving high-efficiency silicon-based solar-cell by means of the up-conversion of the sub-bandgap near-infrared part of the solar spectrum (E < 1.12 eV) to visible/near-infrared photons.
Upconversion Nanophosphors Rare-earth ions Solar cells
Gibart P, Auzel F, Guillaume JC, Zahraman K (1996) Below band-gap IR response of substrate-free GaAs solar cells using two-photon up-conversion. Jpn J Appl Phys 35(Part 1):4401–4403. doi:10.1143/JJAP.35.4401CrossRefGoogle Scholar
Shalav A, Richards BS, Trupke T, Kramer KW, Gudel H (2005) Application of NaYF4:Er3+ up-converting phosphors for enhanced near-infrared silicon solar cell response. Appl Phys Lett 86:013505. doi:10.1063/1.1844592CrossRefGoogle Scholar
Digonnet MJF (2001) Rare-earth-doped fiber lasers and amplifiers. Marcel Dekker, New YorkGoogle Scholar
Reisfeld R, Jorgensen CK (1977) Lasers and excitated states of rare-earth. Springer, BerlinGoogle Scholar
Ryba-Romanowski W, Golab S, Dominiak-Dzik G, Slarz P, Lukasmer T (2001) Conversion of infrared radiation into red emission in YVO4:Yb,Ho. Appl Phys Lett 79:3026–3028. doi:10.1063/1.1415767CrossRefGoogle Scholar
Zhang QY, Li T, Jiang ZH, Ji XH, Buddhudu S (2005) 980 nm laser-diode-excited intense blue upconversion in Tm3+ /Yb3+ -codoped gallate-bismuth-lead glasses. Appl Phys Lett 87:171911. doi:10.1063/1.2115082CrossRefGoogle Scholar