Benefit from Photon Recycling at the Maximum-Power Point of State-of-the-Art Perovskite Solar Cells

Brenes, Roberto; Laitz, Madeleine; Jean, Joel; deQuilettes, Dane W.; Bulović, Vladimir

doi:10.1103/physrevapplied.12.014017

Cited by 57 publications

(66 citation statements)

References 56 publications

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“…The experimental ELQE (8.4%) being larger than the numerical value

E_{t}^{int} = 7.8 %

shows that a high ILQE was achieved. For semiconductors with high ILQE, photon recycling, [ 42 ] i.e., the reabsorption of previously emitted photons within the perovskite, can increase the ELQE to values higher than what would be expected from the optical simulations, where photon recycling was neglected. [ 43 ] An experimental proof of internal photon recycling in perovskite solar cells was given by Pazos–Outón et al [ 44 ] Furthermore, Braly et al demonstrated perovskite films with 90% ILQE.…”

Section: Resultsmentioning

confidence: 99%

Perovskite/Silicon Tandem Solar Cells: Effect of Luminescent Coupling and Bifaciality

Jäger

Tillmann

Katz³

et al. 2021

Solar RRL

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The power conversion efficiency of the market‐dominating silicon photovoltaics approaches its theoretical limit. Bifacial solar operation with harvesting additional light impinging on the module back and the perovskite/silicon tandem device architecture are among the most promising approaches for further increasing the energy yield from a limited area. Herein, the energy output of perovskite/silicon tandem solar cells in monofacial and bifacial operation is calculated, for the first time considering luminescent coupling (LC) between two sub‐cells. For energy yield calculations, idealized solar cells are studied at both standard testing as well as realistic weather conditions in combination with a detailed illumination model for periodic solar panel arrays. Typical experimental photoluminescent quantum yield values reveal that more than 50% of excess electron–hole pairs in the perovskite top cell can be utilized by the silicon bottom cell by means of LC. As a result, LC strongly relaxes the constraints on the top‐cell bandgap in monolithic tandem devices. In combination with bifacial operation, the optimum perovskite bandgap shifts from 1.71 eV to the range 1.60–1.65 eV, where already high‐quality perovskite materials exist. The results are very important for developing optimal perovskite materials for tandem solar cells.

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“…The experimental ELQE (8.4%) being larger than the numerical value

E_{t}^{int} = 7.8 %

Section: Resultsmentioning

confidence: 99%

Perovskite/Silicon Tandem Solar Cells: Effect of Luminescent Coupling and Bifaciality

Jäger

Tillmann

Katz³

et al. 2021

Solar RRL

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“…The first is the radiative (or trivial) ET mechanism, i.e., PR, where emitted photons from one NC are reabsorbed by the neighboring NCs. PR has also been reported to enhance not only the transport properties in other types of perovskite systems [25][26][27][28][29][30][31] but also LED performances 32 .…”

Section: Imaging Of Exciton Diffusion In Pnc Filmsmentioning

confidence: 99%

Origins of the long-range exciton diffusion in perovskite nanocrystal films: photon recycling vs exciton hopping

et al. 2021

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The outstanding optoelectronic performance of lead halide perovskites lies in their exceptional carrier diffusion properties. As the perovskite material dimensionality is reduced to exploit the quantum confinement effects, the disruption to the perovskite lattice, often with insulating organic ligands, raises new questions on the charge diffusion properties. Herein, we report direct imaging of >1 μm exciton diffusion lengths in CH3NH3PbBr3 perovskite nanocrystal (PNC) films. Surprisingly, the resulting exciton mobilities in these PNC films can reach 10 ± 2 cm2 V−1 s−1, which is counterintuitively several times higher than the carrier mobility in 3D perovskite films. We show that this ultralong exciton diffusion originates from both efficient inter-NC exciton hopping (via Förster energy transfer) and the photon recycling process with a smaller yet significant contribution. Importantly, our study not only sheds new light on the highly debated origins of the excellent exciton diffusion in PNC films but also highlights the potential of PNCs for optoelectronic applications.

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“…In addition, also efforts to make single crystal perovskite solar cells are pursued [37,38] with a recent report of efficiencies exceeding 20% [38]. Close to the radiative limit, physical phenomena such as photon recycling [23,39,40] become important that are not or hardly relevant for most materials used in photovoltaics. Photon recycling specifies the process of photogeneration of electron-hole pairs by photons that are created by radiative recombination of electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Effect of reabsorption and photon recycling on photoluminescence spectra and transients in lead-halide perovskite crystals

et al. 2020

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Explaining the time-dependent evolution of photoluminescence spectra of halide perovskite single crystals after pulsed excitation requires the consideration of a range of physical mechanisms, including electronic transport, recombination and reabsorption. The latter process of reabsorption and regeneration of electron-hole pairs from a photon created by radiative recombination in the single crystal itself is termed photon recycling and has been a highly controversial topic. We use photoluminescence experiments performed under different illumination conditions combined with numerical simulations that consider photon recycling to show which parameters affect temporal decays, spectral shifts and differences in the illumination direction. In addition, we use numerical simulations with and without photon recycling to understand the relative importance of chargecarrier transport and photon recycling. We conclude that under most relevant illumination conditions and times after the pulse, electronic transport is more important than photon recycling for the spectral behavior of the transients. However, inclusion of photon recycling is imperative for the understanding of the absolute density of electrons and holes present in the crystal during a certain time after the pulse.

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Benefit from Photon Recycling at the Maximum-Power Point of State-of-the-Art Perovskite Solar Cells

Cited by 57 publications

References 56 publications

Perovskite/Silicon Tandem Solar Cells: Effect of Luminescent Coupling and Bifaciality

Perovskite/Silicon Tandem Solar Cells: Effect of Luminescent Coupling and Bifaciality

Origins of the long-range exciton diffusion in perovskite nanocrystal films: photon recycling vs exciton hopping

Effect of reabsorption and photon recycling on photoluminescence spectra and transients in lead-halide perovskite crystals

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