III–V solar cells under monochromatic illumination

Bett, Andreas W.; Dimroth, Frank; Lockenhoff, Rudiger; Oliva, E.; Schubert, Johannes

doi:10.1109/pvsc.2008.4922910

Cited by 48 publications

(25 citation statements)

References 9 publications

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“…Very high opto-electrical conversion efficiencies can be achieved with PV cells as power converters for monochromatic light, as the semiconductor material's bandgap can be well matched to the energy of the photons [8]. GaAs is a well-known semiconductor material that is frequently used for laser power converters.…”

Section: Photovoltaic Laser Power Convertersmentioning

confidence: 99%

On the temperature dependence of dual‐junction laser power converters

Reichmuth

Helmers

Philipps

et al. 2016

Progress in Photovoltaics

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Dual-junction GaAs laser power converters optimized for one monochromatic wavelength are presented, and their temperature dependence is experimentally evaluated. External quantum efficiency and irradiance-dependent currentvoltage measurements (10 to 104 W/cm 2 ) under monochromatic laser light (809 nm) have been undertaken to quantify temperature-and irradiance-dependent effects on the performance. The temperature dependence of the current matching of the two subcells, caused by the temperature-dependent absorbance, is quantified. Losses in performance due to variations in operating temperature for different power-by-light applications are calculated to be between 16.2% and 21.0%. Future potential enhancements in cell performance are discussed. For elevated temperatures, super-linear behavior of the spectral response with increasing irradiance is observed, which is attributed to effective luminescent coupling from the top to the bottom subcell as the device becomes more radiative limited. For low temperatures, where the bottom cell is overproducing, no dependence on irradiance is found, which shows the influence of photon transport losses to the substrate.

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Section: Photovoltaic Laser Power Convertersmentioning

confidence: 99%

On the temperature dependence of dual‐junction laser power converters

Reichmuth

Helmers

Philipps

et al. 2016

Progress in Photovoltaics

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“…In this case, power can be transmitted by a laser beam [19]- [20]. In comparison with MPT, laser systems offer larger improvement capacities and potentially much smaller systems [19].…”

Section: Laser-based Wptmentioning

confidence: 99%

A Review on Wireless Power Transfer in Free Space and Conducting Lossy Media

Alrawashdeh¹

2017

JJCIT

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“…Single junction PV cells have already demonstrated conversion efficiencies above 50% under monochromatic illumination using a laser light source [34]. Therefore, the current challenge of narrowband TPV approach consists of developing the appropriate emitter element to produce high quality quasi-monochromatic thermal emission at high temperatures [35].…”

Section: Introductionmentioning

confidence: 99%

Optimum semiconductor bandgaps in single junction and multijunction thermophotovoltaic converters

Datas

2015

Solar Energy Materials and Solar Cells

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The choice of the optimum semiconductor for manufacturing thermophotovoltaic (TPV) cells is not straightforward. In contrast to conventional solar photovoltaics (PV) where the optimum semiconductor bandgap is determined solely by the spectrum (and eventually the irradiance) of the incident solar light, in a TPV converter it depends on the emitter temperature and on the spectral control elements determining the net spectral power flux between the TPV cell and the emitter. Additionally, in TPV converters there is a tradeoff between power density and conversion efficiency that does not exist in conventional solar PV systems. Thus, the choice of the proper semiconductor compound in TPV converters requires a thorough analysis that has not been presented so far. This paper presents the optimum semiconductor bandgaps leading to the maximum efficiency and power density in TPV converters using both single junction and multijunction TPV cells. These results were obtained within the framework of the detailed balance theory and assuming only radiative recombination. Optimal bandgaps are provided as a function of the emitter and cell temperature, as well as the degree of spectral control. I show that multijunction TPV cells are excellent candidates to maximize both the efficiency and the power density simultaneously, eliminating the historical tradeoff between efficiency and power density of TPV converters. Finally, multijunction TPV cells are less sensitive to photon recycling losses, which suggest that they can be combined with relatively simple cut-off spectral control systems to provide practically-viable high performing TPV devices.

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III–V solar cells under monochromatic illumination

Cited by 48 publications

References 9 publications

On the temperature dependence of dual‐junction laser power converters

On the temperature dependence of dual‐junction laser power converters

A Review on Wireless Power Transfer in Free Space and Conducting Lossy Media

Optimum semiconductor bandgaps in single junction and multijunction thermophotovoltaic converters

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