Optimal Bandgap Combinations—Does Material Quality Matter?


The balance of photogeneration and recombination gives rise to an optimum bandgap for any solar cell. The radiative limit represents the lowest permissible level of recombination in a solar cell and, therefore, places an upper limit on the voltage that can be attained. Introducing additional nonradiative recombination results in a loss in voltage that can only be compensated for by moving to higher bandgaps. Consequently, the optimal bandgap for solar energy conversion will rise with increasing nonradiative recombination rate. This balance was recognized by Shockley and Queisser for single-junction solar cells and is here extended to multijunction solar cells. A rise in optimal bandgaps has been observed in simulated single-, double-, and triple-junction devices as nonradiative recombination increases. Optimal bandgaps between excellent and poor diode quality devices are shown to differ by 100s of meV under 1-sun illumination with both terrestrial and extraterrestrial spectra but exhibit no significant change at high concentration due to the dominance of the radiative component in the recombination dynamics.

Did you like this research project?

To get this research project Guidelines, Training and Code... Click Here

PROJECT TITLE : Optimal Placement and Intelligent Smoke Detection Algorithm for Wildfire-Monitoring Cameras ABSTRACT: Wildfire smoke is frequently evident much before flames are visible. To avoid major property losses and heavy
PROJECT TITLE : OFS-NN An Effective Phishing Websites Detection Model Based on Optimal Feature Selection and Neural Network ABSTRACT: Phishing attacks have become a major menace to people's daily lives and social networks. Attackers
PROJECT TITLE : Optimal Phase Shift Control to Minimize Reactive Power for a Dual Active Bridge DC-DC Converter ABSTRACT: Under non-unity voltage gain conditions, modulating the phase shift ratios in a dual active bridge (DAB)
PROJECT TITLE : Convex Relaxations of Probabilistic AC Optimal Power Flow for Interconnected AC and HVDC Grids ABSTRACT: Increased reliability, connection to offshore wind, and coupling of power markets are all benefits of
PROJECT TITLE : Two-Layer Control Scheme for Maintaining the FrequencyVoltage and the Optimal Economic Operation of Hybrid ACDC Microgrids ABSTRACT: This work proposes a hierarchical control strategy for hybrid AC/DC microgrids

Ready to Complete Your Academic MTech Project Work In Affordable Price ?

Project Enquiry