Green upconversion improvement of TiO2 codoped Er3+-Yb3+ nanoparticles based thin film by adding ALD-Al2O3 for silicon solar cell applications

Infrared to green conversion of long persistent luminescent Eu2+-Dy3+ Co-doped SrAl2O4

“…One of the challenges which solar cells are facing is the loss of the photons whose energy is lower than the bandgaps of cell's materials [1][2][3]. The conversion from the photons with long wavelength into those with short wavelength is considered as a possible way to improve the solar cell's performance [4][5][6]. Due to the huge amount of long wavelength infrared photons in sunlight, the investigation about spectral conversion materials has become active in recent years [7][8][9].…”