Designing a dual-mode broadband solar spectral converter: The example of Bi3+, Cr3+, Yb3+-tridoped perovskite

Light conversion material: LiBaPO4:Eu2+, Pr3+, suitable for solar cell

“…Generally, phonons assisted non-radiative relaxation process from the upper level to the lower level is possible, if the energy gap is less than 5 times the energy of the highest energy phonon. Therefore, it is expected that multi-phonon relaxation process from 3 In a word, the whole blue-to-red ET process could be expressed as (2a / 2b / 2c/2d / 599 nm) for the red emissions from the 1 D 2 level and (2a / 2b / 606 nm) from the 3 P 0 level.…”

“…3. Thus, the cross-relaxation (2e), 3 F 4 ] will happen due to the small energy mismatch. In other words, electrons populate to the 1 G 4 level by two steps of cross-relaxation (2d-2e) when excited into 3 P 0 level.…”

“…Phosphors doped with rare earth ions (Re n+ ) are used for many devices such as white light emitting diodes (WLED), displays and so on. [1][2][3] Recently, they have also attracted much interest for photovoltaic applications to improve solar cell efficiency by modifying the solar spectrum. Si solar cells effectively convert near infrared (NIR) photons of lower energy close to the semiconductor band gap (E g z 1.12 eV, l z 1000 nm).…”

“…As we know, Pr 3+ ion has the ability to absorb visible photons and emits NIR photons, because of its abundant energy levels in UV-Vis-NIR range. For instance, Pr 3+ ion doped phosphors can be excited at the range of 440-700 nm due to the transitions from 3 H 4 to 1 D 2 ($600 nm), 3 P J (J ¼ 0, 1, 2) and 1 I 6 (440-490 nm), and emit NIR phonons at $1000 nm ascribed to the 3…”

Realization of an Antireflection Nanopore Array for Black Si Solar Energy Utilization

“…Solar energy has been considered having the potential for future worldwide energy demand and reduces the dependence on fossil fuel sources, because of its inexhaustive, sustainable and environmental friendliness [1,2]. In the last 50 years, commercial silicon photovoltaics have been developed to convert sunlight into electricity at efficiencies about 20% [3].…”