Enhancement of the photovoltaic properties of Ag<sub>2</sub>BiI<sub>5</sub>by Cu doping

Park, Jin Woo; Lim, Yeongsu; Doh, Kyung-Yeon; Jung, Min Tai; Jeon, Young In; Yang, In Seok; Choi, Hyeon-Seo; Kim, Jeongho; Lee, Donghwa; Lee, Wan In

doi:10.1039/d0se01563f

Cited by 19 publications

(32 citation statements)

References 53 publications

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“…This band decayed much faster than the “Ag x Bi y I x +3 y part” of the transient spectrum and is reported here for these rudorffite compounds for the first time. It was probably not detected in previous transient absorption experiments because the wavelength range below 450 nm was not probed in those studies. , …”

Section: Resultssupporting

confidence: 88%

“…In this contribution, we tackle this problem from a spectroscopic viewpoint by investigating spin-coated (AgI) x (BiI 3 ) y thin films over a wide composition range using broadband UV–vis transient absorption (TA) spectroscopy and sensitive Fourier-transform step-scan photocurrent spectroscopy (FTPS). The two available previous transient absorption studies on such systems focused on the visible region (450–760 nm). , However, as we will show here, the spectral region below 450 nm contains central information regarding the electron–hole recombination process in the (AgI) x (BiI 3 ) y compounds and the potential impact of AgI impurities. In addition, the FTPS experiments provide valuable clues regarding disorder and defect properties of these films.…”

Section: Introductionmentioning

confidence: 99%

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Critical Evaluation of the Photovoltaic Performance of (AgI)_x(BiI₃)_y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments

et al. 2023

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Silver iodobismuthate thin films obtained from mixtures of AgI and BiI 3 have been frequently suggested as promising alternatives for lead-based perovskite materials in photovoltaic applications. Here, we investigated (AgI) x (BiI 3 ) y thin films with stoichiometric ratios (x/y) of 3:1, 2:1, 1:1, and 1:2 produced via a low-temperature (<100 °C) spin coating process from AgI/BiI 3 solutions in dimethyl sulfoxide. Several critical observations on the basis of ultrafast broadband UV−vis transient absorption spectroscopy and photocurrent spectroscopy were made for these Ag−Bi−I materials, which will have a considerable impact on their photovoltaic performance: Their carrier recombination kinetics were independent of the initial carrier number density over the range of 1.3−6.6 × 10 17 cm −3 and well approximated by a monoexponential decay with a rate constant k rec in the range of 2.0−4.3 × 10 8 s −1 , which is consistent with trap-mediated charge-carrier recombination. Moreover, pronounced coherent phonon dynamics was observed for all of these (AgI) x (BiI 3 ) y compounds, thereby suggesting strong electron−phonon coupling, which will favor charge-carrier localization and nonradiative carrier recombination, in agreement with the virtually absent photoluminescence of these materials. In addition, Fourier-transform step-scan photocurrent spectroscopy (FTPS) on AgBi 2 I 7 provided an Urbach energy of 70 meV and found indications for deep defects (0.6 eV below the band gap), which was also consistent with a trap-mediated recombination mechanism. A combination of all of these effects is likely responsible for the still quite low light-harvesting performance of this class of materials, which has been reported to show photovoltaic conversion efficiencies (PCEs) below 5%. Finally, for "AgI-rich" compounds (3:1, 2:1), we found a substantial separate contribution of carrier loss processes through ultrafast relaxation in AgI domains with time constants of 0.73 and 2.4 ps.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Critical Evaluation of the Photovoltaic Performance of (AgI)_x(BiI₃)_y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments

et al. 2023

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“…Park et al recently achieved partial substitution of Ag + by Cu + to enhance light‐harvesting properties. [ 81 ] The resulting [Cu n Ag 2‐ n ]BiI 5 films did not exhibit significant crystallographic changes or phase segregation other than the apparent structural contraction for doping concentrations up to 10 at.%.…”

Section: Crystal Structures and Compositionsmentioning

confidence: 99%

“…Finally, another coinage metal Cu + was also reported to favorably affect the crystallinity, morphology, and optoelectronic properties of Ag 2 BiI 5 by improving the intrinsic light absorption and overall stability of the films. [ 81 ]…”

Section: Synthesis and Thin‐film Depositionmentioning

confidence: 99%

Rudorffites and Beyond: Perovskite‐Inspired Silver/Copper Pnictohalides for Next‐Generation Environmentally Friendly Photovoltaics and Optoelectronics

Chakraborty

Pai

Zhao

et al. 2022

Adv Funct Materials

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In the wake of lead-halide perovskite research, bismuth-and antimony-based perovskite-inspired semiconducting materials are attracting increasing attention as safer and potentially more robust alternatives to lead-based archetypes. Of particular interest are the group IB-group VA halide compositions with a generic formula A x B y X x+3y (A + = Cu + /Ag + ; B 3+ = Bi 3+ /Sb 3+ ; X -= I -/Br -), i.e., silver/copper pnictohalides and derivatives thereof. This family of materials forms 3D structures with much higher solar cell efficiencies and greater potential for indoor photovoltaics than the lower-dimensional bismuth/ antimony-based perovskite-inspired semiconductors. Furthermore, silver/ copper pnictohalides are being investigated for applications beyond photovoltaics, e.g., for photodetection, ionization radiation detection, memristors, and chemical sensors. Such versatility parallels the wide range of possible compositions and synthetic routes, which enable various structural, morphological, and optoelectronic properties. This manuscript surveys the growing research on silver/copper pnictohalides, highlighting their composition-structure-property relationships and the status and prospects of the photovoltaic and optoelectronic devices based thereon. The authors hope that the insights provided herein might accelerate the development of eco-friendly and stable perovskiteinspired materials for next-generation photovoltaics and optoelectronics.

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“…Another possibility is the preparation of A3B2X9 (A=alkali metal or alkylammonium, B=Bi or Sb, X=halide) which is known to possess vacancy ordered layered triple perovskite structure exhibiting high absorption coefficient. 329 But the poor performance of solar cells based on bismuth based ternary halides owing to their layered architecture and high optical bandgap has limited their use in photovoltaics. These limitations have pushed the research in this field towards introduction of monovalent cations of silver in the A-site leading to formation of silver bismuth iodide compositions with interesting features.…”

Section: Introductionmentioning

confidence: 99%

Bismuth based perovskite inspired absorbers for optoelectronic applications

Vipinraj¹

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This thesis contains material from 3 papers published in the following peer-reviewed journals / from papers accepted at conferences in which I am listed as an author.Chapter 2 is published as Jiban Kangsabanik, Vipinraj Sugathan, Anuradha Yadav, Aswani Yella, and Aftab Alam. Double perovskites overtaking the single perovskites:A set of new solar harvesting materials with much higher stability and efficiency. Phys.

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Enhancement of the photovoltaic properties of Ag₂BiI₅by Cu doping

Abstract: Cu-doped Ag2BiI5 (Cu:SBI) powders with 0–10 mol% doping concentrations were synthesized by a solid-state method in an evacuated glass tube. While doping of Cu did not appreciably modify the crystallographic...

Cited by 19 publications

References 53 publications

Critical Evaluation of the Photovoltaic Performance of (AgI)_x(BiI₃)_y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments

Critical Evaluation of the Photovoltaic Performance of (AgI)_x(BiI₃)_y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments

Rudorffites and Beyond: Perovskite‐Inspired Silver/Copper Pnictohalides for Next‐Generation Environmentally Friendly Photovoltaics and Optoelectronics

Bismuth based perovskite inspired absorbers for optoelectronic applications

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Enhancement of the photovoltaic properties of Ag2BiI5by Cu doping

Abstract: Cu-doped Ag2BiI5 (Cu:SBI) powders with 0–10 mol% doping concentrations were synthesized by a solid-state method in an evacuated glass tube. While doping of Cu did not appreciably modify the crystallographic...

Cited by 19 publications

References 53 publications

Critical Evaluation of the Photovoltaic Performance of (AgI)x(BiI3)y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments

Critical Evaluation of the Photovoltaic Performance of (AgI)x(BiI3)y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments

Rudorffites and Beyond: Perovskite‐Inspired Silver/Copper Pnictohalides for Next‐Generation Environmentally Friendly Photovoltaics and Optoelectronics

Bismuth based perovskite inspired absorbers for optoelectronic applications

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Enhancement of the photovoltaic properties of Ag₂BiI₅by Cu doping

Critical Evaluation of the Photovoltaic Performance of (AgI)_x(BiI₃)_y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments

Critical Evaluation of the Photovoltaic Performance of (AgI)_x(BiI₃)_y Thin Films from the Viewpoint of Ultrafast Spectroscopy and Photocurrent Experiments