Enhance the photoconversion efficiency of carbon-based perovskite solar cells through the synergetic effect of upconversion nanoparticles Li doped NaYbF4:Ho3+ and 2D g-C3N4

Co-doped NaYF4:Yb/Er/Tm upconversion luminescent coating to enhance the efficiency of photovoltaic cells

“…1 Photovoltaic cells absorb solar radiation in the wavelength range of 300–1100 nm, mainly absorbing visible photons, while infrared photons are not fully utilized. 2,3 A wider absorption spectrum is very much needed in photovoltaic cell applications. 4 The current annual use of solar energy is well below 1% of the total energy consumption, and more efficient and cheaper photovoltaic systems must be developed to achieve large-scale energy utilization.…”

Highly controllable and reproducible one-step synthesis of β-NaYF4:Er3+@NaYbF4@NaYF4 upconversion nanoparticles for Sb2(S,Se)3 solar cells with enhanced efficiency

“…Photon upconversion (UC) materials with the ability to convert low-energy near-infrared (NIR) excitation to high-energy visible emission have been a hot topic in materials science given their potential applications, mainly in laser physics and bioimaging, [1][2][3][4] and more recently, in photovoltaics. [5][6][7][8][9] Among UC materials, lanthanide (Ln)-doped upconversion nanoparticles (UCNPs) were widely studied for their high chemical stability, long excited state lifetime and sharp emission bandwidth. 10 With the rapid development of nanoscience, a variety of Ln-doped UCNPs have been successfully synthesized based on different routes, such as solvothermal, hydrothermal and thermal decomposition methods.…”

Heteroepitaxial Growth to Construct Hexagonal/Hexagonal β‐NaYF4:Yb,Tm/Cs4PbBr6 Multi‐Code Emitting Core/Shell Nanocrystals

“…This strategy can combine the benefits of both types of particles to realize tunable upconversion fluorescence emission, which holds great potential in numerous optoelectronic applications. [9][10][11][12][13][14][15][16][17][18][19] Physical mixing is a facile approach to obtain UCNP/MHP hybrid nanocomposite, nevertheless, its emission property is governed by the respective concentrations of UCNPs and MHPs due to the radiative emission reabsorption (ERA) energy transfer (ET) process. [20] Therefore, synthesis of UCNP/MHP heterostructure nanocrystals (NCs), which can realize ET through the Förster resonance energy transfer (FRET) process, is regarded as a potential way to produce efficient upconversion luminescence.…”

“…This strategy can combine the benefits of both types of particles to realize tunable upconversion fluorescence emission, which holds great potential in numerous optoelectronic applications. [ 9–19 ]…”