Design and growth of InAsP metamorphic buffers for InGaAs thermophotovoltaic cells

Nguyễn, Thùy Anh; Kim, Yeongho; Park, Suho; Lee, Sang Jun; Jo, Hyun-Jun; Kim, Jong Su; Nguyen, Long H.; Kim, Eui‐Tae

doi:10.1007/s40042-021-00152-9

Cited by 3 publications

(5 citation statements)

References 26 publications

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“…According to reports, excessive PbI 2 accelerates the degradation of perovskite, so reducing the amount of PbI 2 can promote the stability of perovskite to a certain extent [33,34] . At the same time, the diffraction intensity of the main peak (001) in the perovskite film treated with CDT‐S or CDT‐N is significantly enhanced, indicating that the existence of CDT‐S and CDT‐N improved the crystallinity of perovskite film [35] . We also tested the UV‐vis of perovskite films, as shown in Figure 3b, after the introduction of CDT‐S or CDT‐N in perovskite films, there was no significant change in the absorption spectra, manifesting that CDT‐S or CDT‐N did not influence the light absorption property of perovskite films.…”

Section: Resultsmentioning

confidence: 94%

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Chen,

Zeng,

Gao

et al. 2023

ChemSusChem

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The uncoordinated lead cations are ubiquitous in perovskite films and severely affect the efficiency and stability of perovskite solar cells (PSCs). In this work, 15‐crown‐5 with various heteroatoms are connected to the organic semiconductor carbazole diphenylamine, and two new compounds, CDT‐S and CDT‐N, are developed to modify the Pb2+ defects in perovskite films through the anti‐solvent method. Apart from the oxygen atoms, there are also N atoms on crown ether ring in CDT‐N, and both S and N heteroatoms in CDT‐S. The heteroatoms enhance the interaction between the crown ether‐based semiconductors and the undercoordinated Pb2+ defect in perovskite. Particularly, the stronger interaction between S atoms and Pb2+ further enhances the defect passivation effect of CDT‐S than CDT‐N, thereby more effectively suppressing the non‐radiative recombination of charge carriers. Finally, the efficiency of the device treated with CDT‐S is up to 23.05%. Moreover, the unencapsulated device based on CDT‐S maintained 90.5% of the initial efficiency after being stored under dark conditions for 1000 hours, demonstrating good long‐term stability. Our work demon‐strates that crown ethers are promising in perovskite solar cells, and the crown ether containing multiple heteroatoms could effectively improve both efficiency and stability of devices.

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Section: Resultsmentioning

confidence: 94%

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Chen,

Zeng,

Gao

et al. 2023

ChemSusChem

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“…[ 46 ] Similarly, adding Pb(SCN) 2 in Cs 0.1 FA 0.9 PbI 1.4 Br 1.6 has passivated GB and caused beneficial upward band bending at GB. [ 47 ] Several theories have been developed to explain the transport behavior of GBs with beneficial upward band bending at GB. The material discontinuity and dangling bond at the GB interface trap‐free carriers, and as a result, a potential energy barrier is built that eventually inhibits the transport of charge carriers and causes band bending.…”

Section: Resultsmentioning

confidence: 99%

“…Upward band bending accumulates holes and repels electrons at the interface, thus decreasing the probability of e–h recombination via the GB interface state, as shown schematically in Figure 4b. [ 47 ]…”

Section: Resultsmentioning

confidence: 99%

“…Upward band bending accumulates holes and repels electrons at the interface, thus decreasing the probability of e-h recombination via the GB interface state, as shown schematically in Figure 4b. [47] We conduct numerical simulations using an interface defect model to generate an insight into the electrical nature of GB and its impact on the performance parameters and device functioning. In the practical device of CIGS, the segregation of the charge carrier at the GB provides its electrical nature.…”

Section: Gb Impactmentioning

confidence: 99%

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Impact of Grain Size and Grain Nature in Thin‐Film Solar Cells

Prabu,

Malathi,

Kumar

et al. 2023

Energy Tech

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Herein, a theoretical investigation is conducted on grain‐size inhomogeneity's impact and grain boundaries’ (GBs’) electrical nature in thin‐film solar cells. Using the Matthiessen rule, grain‐size‐dependent mobility is derived in polycrystalline material. The obtained grain‐size‐dependent mobility values are fed into the Poisson solver to calculate device performance. The severity of grain sizes in the lower region determines how grain size affects the photovoltaic performance by grain‐size‐dependent efficiency simulation. Low grain sizes become critical, especially for low‐thickness absorbers. The second aspect of the study assesses potential variation at GBs to reveal the impact of the electrical properties of GBs. Evidence shows that the acceptor defects at GB are benign for device performance, causing upward band bending at the GB and acting as electron barriers. Device performance is adversely affected by donor defects at GBs due to downward band bending. As summarized in the findings, the polycrystallinity‐induced cause–effect relationships of grains are likely to interest solar cell researchers.

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“…On top of that, high thickness reduces the fraction of light transmitted to the underlying cells, resulting in a decrease in the photocurrent. [183] On the contrary, the textured surface of SSC should be fully covered to avoid shunt losses. Hence, preparing perovskite film over 1 μm is not straightforward in WBG perovskite films with low nonradiative recombination and long carrier diffusion lengths.…”

Section: Perovskite On Textured Surfacementioning

confidence: 99%

Overcoming Two Key Challenges in Monolithic Perovskite‐Silicon Tandem Solar Cell Development: Wide Bandgap and Textured Substrate—A Comprehensive Review

Khan,

Qu,

Muhammad

et al. 2023

Advanced Energy Materials

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Abstract33.7% of power conversion efficiency (PCE) in monolithic perovskite‐silicon tandem solar cells (PSTSCs) is an eye‐catcher. Still, the issues emerging from their two main requirements, wide band gap (WBG) perovskites and textured substrates, trigger phase segregation, voltage deficit, perovskite strain, high recombination rates, shunt paths, etc. In addition, the ill‐defined relations of most of these issues to the WBG perovskites and silicon texture originating from the conflicting research outcomes have become severe impediments to developing PSTSCs. From this perspective, an overview of the recently developed monolithic PSTSCs discussing the major hurdles in their up‐scaling, stabilities, and commercialization is presented.

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Design and growth of InAsP metamorphic buffers for InGaAs thermophotovoltaic cells

Cited by 3 publications

References 26 publications

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Impact of Grain Size and Grain Nature in Thin‐Film Solar Cells

Overcoming Two Key Challenges in Monolithic Perovskite‐Silicon Tandem Solar Cell Development: Wide Bandgap and Textured Substrate—A Comprehensive Review

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