Design of low bandgap tin–lead halide perovskite solar cells to achieve thermal, atmospheric and operational stability

Prasanna, Rohit; Leijtens, Tomas; Dunfield, Sean P.; Raiford, James A.; Wolf, Eli J.; Swifter, Simon A.; Werner, Jérémie; Eperon, Giles E.; Paula, Camila de; Palmstrom, Axel F.; Boyd, Caleb C.; Hest, Maikel F.A.M. van; Bent, Stacey F.; Teeter, Glenn; Berry, Joseph J.; McGehee, Michael D.

doi:10.1038/s41560-019-0471-6

Cited by 267 publications

(283 citation statements)

References 40 publications

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“…On this front, the stability of halide perovskites is slowly improving and, in particular, several successful efforts to promote the longevity of the unstable Sn‐based perovskites have been reported for solar cells. [ 153–156 ] As Sn‐based perovskites have showed encouraging thermoelectric performance at lower temperatures, they can be targeted for room‐temperature applications. This improved stability can, perhaps, attract more efforts for the perovskite thermoelectrics which currently is limited to a few studies.…”

Section: Halide Perovskites Based Thermoelectricsmentioning

confidence: 99%

Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity

et al. 2020

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The recent re-emergence of halide perovskites has received escalating interest for optoelectronic applications. In addition to photovoltaics, the multifunctional nature of halide perovskites has led to diverse applications. The ultralow thermal conductivity coupled with decent mobility and charge carrier tunability led to the prediction of halide perovskites as a possible contender for future thermoelectrics. Herein, recent advances in thermal transport of halide perovskites and their potentials and challenges for thermoelectrics are reviewed. An overview of the phonon behavior in halide perovskites, as well as the compositional dependency is analyzed. Understanding thermal transport and knowing the thermal conductivity value is crucial for creating effective heat dissipation schemes and determining other thermal-related properties like thermo-optic coefficients, hot-carrier cooling, and thermoelectric efficiency. Recent works on halide perovskite-based thermoelectrics together with theoretical predictions for their future viability are highlighted. Also, progress on modulating halide perovskite-based thermoelectric properties using light and chemical doping is discussed. Finally, strategies to overcome the limiting factors in halide perovskite thermoelectrics and their prospects are emphasized.

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Section: Halide Perovskites Based Thermoelectricsmentioning

confidence: 99%

Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity

et al. 2020

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“…[ 22,23 ] Furthermore, fine‐tuned bromide ratios near the bottom interface have proven to be an effective strategy to regulate defects and the built‐in potential of perovskite devices. [ 24,25 ] Inspired by these observations, control of both defects and energy‐band alignments at the bottom interface have been implemented in perovskite solar cells by introducing a halide‐containing buffer material, [ 26–28 ] resulting in improved device performance. Yet, simultaneous improvements in both structural defects and energy‐band alignments have been rarely investigated in the perovskite photodiodes.…”

Section: Introductionmentioning

confidence: 99%

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

Luo

Zou

Yang

et al. 2020

Adv Funct Materials

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Controlling defects and energy‐band alignments are of paramount importance to the development of high‐performance perovskite‐based photodiodes. Yet, concurrent improvements in interfacial contacts and defect reduction simply by tailoring bottom contacts have not been investigated. An effective strategy is reported that can simultaneously improve energy‐band alignments and structural defects by introducing low‐dimensional contact (LDC) layers at the bottom interface. It is found that LDC‐based perovskites considerably suppress undesirable structural defects induced by microstrains, resulting in reduced nonradiative recombination centers and improved carrier lifetimes. Additionally, the resulting LDC‐based interface structures help block minority carrier injection from the electrodes by forming built‐in electric fields. As a consequence, LDC‐based perovskite photodiodes showed improved light detection capabilities. The result opens an avenue to yield highly efficient photodiodes.

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“…[126] Beside of the etching of ITO, PEDOT:PSS was also reported to react with perovskites, especially with the Sn/Pb perovskites. [127] Prasanna et al fabricated a HTL-free Sn/Pb PSC by directly forming an ITO-perovskite heterojunction to overcome the adverse reaction. [127] However, ITO was also reported to be thermally etched by perovskites just in solid-state films/ devices.…”

Section: Barriers At Other Interfacesmentioning

confidence: 99%

“…[127] Prasanna et al fabricated a HTL-free Sn/Pb PSC by directly forming an ITO-perovskite heterojunction to overcome the adverse reaction. [127] However, ITO was also reported to be thermally etched by perovskites just in solid-state films/ devices. [128] Thus, it is clear that using dense and ion/proton impermeable barrier layers to avoid the direct contact of these reactive layers is a safe way to improve the device stability under harsh external environment.…”

Section: Barriers At Other Interfacesmentioning

confidence: 99%

“…Their PSC kept 95% of the initial PCE after aging at 85 °C for 1000 h in air (Figure 14i,j), and retained nearly 100% of the initial PCE after MPP tracking under continuous light-soaking for 1000 h in N 2 . [127] Above mentioned ITO based top electrodes Reproduced with permission. [70] Copyright 2018, American Chemical Society.…”

Section: Stable Nonmetal Electrodes As Barriersmentioning

confidence: 99%

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Barrier Designs in Perovskite Solar Cells for Long‐Term Stability

Zhang

Liu

Zhang

et al. 2020

Advanced Energy Materials

103

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Perovskite solar cells (PSCs) have attracted much attention in the past decade and their power conversion efficiency has been rapidly increasing to 25.2%, which is comparable with commercialized solar cells. Currently, the long‐term stability of PSCs remains as a major bottleneck impeding their future commercial applications. Beyond strengthening the perovskite layer itself and developing robust external device encapsulation/packaging technology, integration of effective barriers into PSCs has been recognized to be of equal importance to improve the whole device’s long‐term stability. These barriers can not only shield the critical perovskite layer and other functional layers from external detrimental factors such as heat, light, and H2O/O2, but also prevent the undesired ion/molecular diffusion/volatilization from perovskite. In addition, some delicate barrier designs can simultaneously improve the efficiency and stability. In this review article, the research progress on barrier designs in PSCs for improving their long‐term stability is reviewed in terms of the barrier functions, locations in PSCs, and material characteristics. Regarding specific barriers, their preparation methods, chemical/photoelectronic/mechanical properties, and their role in device stability, are further discussed. On the basis of these accumulative efforts, predictions for the further development of effective barriers in PSCs are provided at the end of this review.

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Design of low bandgap tin–lead halide perovskite solar cells to achieve thermal, atmospheric and operational stability

Cited by 267 publications

References 40 publications

Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity

Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

Barrier Designs in Perovskite Solar Cells for Long‐Term Stability

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