Hot Scientific Debate on Halide Perovskites: Fundamentals, Photovoltaics, and Optoelectronics at Eighth Sungkyun International Solar Forum 2019 (SISF 2019)

Seo, Seongrok; Jung, Hyun Suk; Yoo, Pil J.; Park, Jae Hyung; Jung, Duk Young; Park, Nam Gyu

doi:10.1021/acsenergylett.9b01768

Cited by 6 publications

(5 citation statements)

References 27 publications

(47 reference statements)

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Section: Introductionmentioning

confidence: 99%

“…Origin of high efficiencies exhibited by photovoltaics (PVs) and optoelectronic devices fundamentally based on organic-inorganic hybrid metal halides with the crystal structure of perovskite remains a subject of widespread research interest across the globe ( Seo et al., 2019 ). The halide materials show great promise for decreasing the grid parity taking advantages of low-cost starting materials ( Kim et al., 2012 , 2020 ; Lee et al., 2019 ; Seo et al., 2019 ), high throughput ( Brenner et al., 2016 ), and low-temperature fabrication techniques compared with the traditional monocrystalline Si and III-V PV devices ( Brenner et al., 2016 ; Ding et al., 2020a ; Kim et al., 2017 ; Lee et al., 2019 ; Seo et al., 2019 ). Not only the PV devices but also the superior optoelectronic properties of the halide perovskites enable application of the materials in a variety of devices including photodetectors ( Chun et al., 2018 ; Saidaminov et al., 2015 ), light emitting diodes( Lee et al., 2017 , 2020 ), transistors ( Senanayak et al., 2017 ), memories ( Kim et al., 2019 ; Yang et al., 2018 ), nanogenerators ( Ding et al., 2020b ), and spintronics ( Wang et al., 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Dynamic structural property of organic-inorganic metal halide perovskite

et al. 2021

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Unique organic-inorganic hybrid semiconducting materials have made a remarkable breakthrough in new class of photovoltaics (PVs). Organic-inorganic metal (Pb and/or Sn) halides (-I, -Br, and -Cl) are the semiconducting absorber with the crystal structure of the famous ''Perovskite''. It is widely called ''perovskite solar cells (PSCs)'' in PV society. Now, the power conversion efficiency (PCE) of PSCs is recorded in 25.5%. Prototypical composition of the absorbers is (A = methylammonium [MA], formamidinium [FA], and Cs), (M = Pb and/or Sn), and (X = I, Br, and Cl) in the form of perovskite AMX 3 . Since the report on the stable all solid-state PSCs in 2012, the average annual growth rate of PCE is well over $10%. Such an outstanding PV performance attracts huge number of scientists in our research society. Their chemical as well as physical properties are dramatically different from monocrystalline Si, GaAs, other III-IV semiconductors, and many oxides with the crystal structure of perovskite. In this review, different fundamental aspects, in particular, the dynamic properties of A site cationic molecules and PbI 6 octahedrons linked with their corners, from other semiconducting and dielectric materials are reviewed and summarized. Upon discussing unique properties, perspectives on the promising PV applications based on the comprehension in dynamic nature of the orientation in A site molecule and PbI 6 octahedron tilting will be given.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic structural property of organic-inorganic metal halide perovskite

et al. 2021

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“…1−5 The first PSCs using MAPbI 3 as a light absorber layer were reported by Miyasaka et al in 2009, 6 and till date, the reported highest power conversion efficiency (PCE) of PSCs has reached 25.2%. 7 Among all device configurations used for PSCs, compared to the normal n−i−p configuration, the inverted p− i−n planar PSCs have shown extensive merits such as low-cost fabrication, low-temperature processing, and reduced hysteresis, which are of fundamental importance to the commercial application. 8−10 In the inverted planar PSCs, hole transport layers (HTLs) are particularly important for transmitting light and extracting/ transporting hole carriers, as well as improving the crystal qualities of perovskite layers.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, hybrid organic–inorganic halide perovskite materials have attracted increasing attention and achieved exceptional progress in perovskite solar cell (PSC) areas, owing to their unique advantages such as direct and tunable band gap, broad range of light absorption with high absorption coefficient (10 5 /cm), low cost, and simple fabrication process. − The first PSCs using MAPbI 3 as a light absorber layer were reported by Miyasaka et al in 2009, and till date, the reported highest power conversion efficiency (PCE) of PSCs has reached 25.2% . Among all device configurations used for PSCs, compared to the normal n–i–p configuration, the inverted p–i–n planar PSCs have shown extensive merits such as low-cost fabrication, low-temperature processing, and reduced hysteresis, which are of fundamental importance to the commercial application. − …”

Section: Introductionmentioning

confidence: 99%

Optoelectronic Modulation of Undoped NiO_x Films for Inverted Perovskite Solar Cells via Intrinsic Defect Regulation

Feng

Wang

Zhou

et al. 2020

ACS Appl. Energy Mater.

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Ni vacancy (V Ni ) as an intrinsic defect plays an important role in the optical and electronic properties of NiO x films for inverted planar perovskite solar cell (PSC) applications. This work presents a facile method to fabricate highly dense and continuous NiO x films with excellent optical transmittance and electronic conductivity by pulsed laser deposition. By simply adjusting the preparation parameters, including oxygen partial pressure, postannealing temperature, and duration time, the well-regulated V Ni defects contribute to the modified conductivity and optical transmittance of the NiO x films. The conductivity and optical transmittance of NiO x films are all dramatically enhanced with the increasing oxygen partial pressure. Specifically, the valence band level of NiO x is adjusted by the V Ni defect densities to better match or align with that of the perovskite layer for faster hole extraction with lower energy losses. Density functional theory calculation displays that the Fermi energy level is shifted to a lower energy level due to the enhanced hole carrier concentration generated from the increased V Ni . Benefiting from the excellent optical transmittance, electronic conductivity, and well-matched energy alignment, the inverted PSC with NiO x hole transport layer (HTL) exhibits the highest power conversion efficiency of 16.85% with high open-circuit voltage (1.14 V), short-circuit current density (20.49 mA/cm 2 ), fill factor (0.72), and negligible current−voltage hysteresis effect. This work reveals that modulating the intrinsic defects of NiO x HTLs is an efficient way to achieve high performance of NiO x -based inverted PSCs.

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“…Since HOIPs are ionic materials, ionic migration and chemical reactions with the adjacent layers accelerate their degradation. This is also exacerbated by moisture, heat, electric fields, and high-energy electromagnetic waves [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Different, Nondestructive Method of Investigating In Situ Degradation in Hybrid Perovskite Solar Cells

Ugokwe,

Gebremichael,

Ogunmoye

et al. 2024

International Journal of Energy Research

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One of the most significant impediments to the upscaling of hybrid organic-inorganic perovskite (HOIP) solar cells is poor stability. So, to effectively establish precautionary strategies, it is necessary to have a comprehensive grasp of the mechanisms that contribute to their degradation. Conventional characterization techniques used for in situ degradation assessment of perovskite solar cells either track just universal parameters, which yields poor insights about localized degradation processes, or the technique itself induces degradation, which may confound results. Developed in this study is a nondestructive technique of analyzing in situ active layer degradation in HOIP solar cells’ active layer utilizing a combination of optical modelling and ageing device’s reflectance tracking. The optical dielectric functions of the solar cell’s functional layers were modelled using the layers’ transmitted and reflected light spectra. The transfer matrix approach was used to fit the reflectance spectrum of entire solar cell layer stacks utilizing the computed dielectric functions for individual materials and accounting for the possibility of lead iodide gradient layer formation in the model. Leveraging no other characterization method, the presence of a lead iodide gradient layer was identified within the solar cell layer stack, an unmistakable indicator of methyl ammonium lead iodide perovskite (MAPI) degradation, probing with only photons.

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Hot Scientific Debate on Halide Perovskites: Fundamentals, Photovoltaics, and Optoelectronics at Eighth Sungkyun International Solar Forum 2019 (SISF 2019)

Cited by 6 publications

References 27 publications

Dynamic structural property of organic-inorganic metal halide perovskite

Dynamic structural property of organic-inorganic metal halide perovskite

Optoelectronic Modulation of Undoped NiO_x Films for Inverted Perovskite Solar Cells via Intrinsic Defect Regulation

A Different, Nondestructive Method of Investigating In Situ Degradation in Hybrid Perovskite Solar Cells

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Hot Scientific Debate on Halide Perovskites: Fundamentals, Photovoltaics, and Optoelectronics at Eighth Sungkyun International Solar Forum 2019 (SISF 2019)

Cited by 6 publications

References 27 publications

Dynamic structural property of organic-inorganic metal halide perovskite

Dynamic structural property of organic-inorganic metal halide perovskite

Optoelectronic Modulation of Undoped NiOx Films for Inverted Perovskite Solar Cells via Intrinsic Defect Regulation

A Different, Nondestructive Method of Investigating In Situ Degradation in Hybrid Perovskite Solar Cells

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Optoelectronic Modulation of Undoped NiO_x Films for Inverted Perovskite Solar Cells via Intrinsic Defect Regulation