Effect of band gap on power conversion efficiency of single-junction semiconductor photovoltaic cells under white light phosphor-based LED illumination

Experimental evaluation of the effect of spatial position on the power of a 5W LED

“…This study was conducted by optical simulation, in which the researchers concluded that square radial and radial matrices had better efficiency. This confirms that light efficiency,; the relationship between the luminous flux emitted by a light source and the power, has been improved by achieving greater output power due to phenomena such as the reflection of light and its redirection in the middle through the modification of the geometric shape LED (Jarosz, Marczynski & Signerski, 2019;Tsai, Chen, Su & Huang, 2010;Chen & Wu, 2010;Chou, Chen & Yang, 2012).…”

Indoor application of emerging photovoltaics—progress, challenges and perspectives

“…It is expected that further rapid enhancements are achievable both in their efficiency and stability in the near future, considering that a theoretical maximum efficiency of up to 52% has been predicted for PV devices under 1000 lx cool white LEDs with a bandgap $1.9 eV. 48 However, several substantial challenges still remain toward the commercialisation of this emerging PV technology, in particular associated with their limited stability and ecotoxicity. Overcoming these challenges requires substantial further research efforts.…”

“…Therefore, compositional engineering can be an attractive strategy to adjust the bandgap of the perovskite materials in order to achieve the optimal value $1.9 eV, thereby enhancing device performance under low light. 45,48 In recent years, the most common perovskite materials for indoor applications are methyl ammonium lead iodide CH 3 NH 3 PbI 3 (MAPbI 3 ) and its triple-cation tailored structures, with a bandgap of $1.6 eV. 49 Although this value is lower than the ideal bandgap of 1.9 eV, the devices still exhibit decent performances with a V oc of up to 1.1 V due to a high external quantum efficiency (EQE) within the visible region and a small voltage loss.…”

Improvement of Temperature and Optical Power of an LED by Using Microfluidic Circulating System of Graphene Solution

“…Furthermore, numerous studies have examined the energy conversion of artificial light [ 52 , 53 , 54 , 55 ] and white light LEDs [ 56 , 57 , 58 ]. Evidence suggests that the power conversion efficiencies of solar cells and LEDs are lower than 53.6% [ 59 , 60 ] and that the efficiency of LEDs is 42% at 30 °C, dropping to 30% at 50 °C [ 61 ]. However, the aforementioned studies focused predominantly on energy conversion from optical power to electric power; energy conversion from electric power to optical power has seldom been discussed.…”