From seting modeling, the semiconductor transport equations should account for this to predict accurate open-circuit voltages, even for gallium arsenide on substrate. The current-voltage characteristics of gallium arsenide on substrate and gallium arsenide are predicted to good accuracy. Using this calibrated photon recycling model, the influences of base thickness and SRH lifetimes on device performance are studied so as to work out an optimal gaas solar cell design employing a conventional silver back reflector and a near-perfect back reflector. The results show that under the AM1.5g standard test conditions, the electron and hole SRH lifetimes of gaas solar cell are 1 μs and 100 ns, respectively, and the gaas solar cell efficiency is >28%. Finally, it is found that the doping concentration in the emitter is not important in determining the open circuit voltage of the gaas solar cell, because the battery is close to the radiation limit, and for the non-radiation-dominated gallium arsenide, it is found that the open circuit voltage depends on the gaas solar cell's doping through the emitter Miscellaneous built-in voltage.
Recent years, enabling perovskite gaas solar cell with certified power conversion efficiencies greater than 25%. Supply radiative recombination is that the dominant recombination mechanism, photon recycling – the way of reabsorption of photons that result from radiative recombination – always utilized to further enhance the PCE toward the Shockley–Queisser (S-Q) theoretical limit. Geometrical optics are always exploited for the intentional trapping of such re-emitted photons within the device, to reinforce the PCE. But, this scheme reaches its fundamental diffraction limits at the submicron scale. The introduction of photonic nanostructures provides an attractive solution, through optical coupling into the guided mode, controlling and trapping light on the nanoscale, and also as a local surface plasmon and surface plasmon polaron mode. This review focuses on light trapping schemes for effective photon recovery in PSC. The first step is to summarize the working principle of photon recycling, and then review the basic requirements that form this efficient process. Then investigate the photon recovery in the state-of-the-art PSC, and propose a design strategy to invoke light capture to effectively utilize the photon recovery in the PSC. Finally, in the context of photon recycling, formulate future prospects and discuss new research directions.