Development of lead-free Cu2BiI5 rudorffite thin films for visible light photodetector application

Ramachandran, Anjali Adappattu; Krishnan, Bindu; Avellaneda, David Avellaneda; Palma, Maria Isabel Mendivil; Aguilar-Martínez, J.A.; Shaji, Sadasivan

doi:10.1016/j.apsusc.2021.150438

Cited by 11 publications

(14 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Little is known about the other Cu-containing compound Cu 2 BiI 5 , which has been reported to crystallize in a hexagonal unit cell, 22 with no crystal structural solution or devices reported yet; but it has a band gap of 1.53–1.74 eV. 26 …”

Section: Cui–agi–bii 3 Phase Spacementioning

confidence: 99%

“…To stabilize a Cu-containing material, we previously synthesized Cu 2 AgBiI 6 and fabricated a preliminary device with a PCE of 0.43%. , The band gap was found to be 2.06(1) eV, which was modeled to pair efficiently with a crystalline silicon solar absorber in a lead-free tandem cell. Little is known about the other Cu-containing compound Cu 2 BiI 5 , which has been reported to crystallize in a hexagonal unit cell, with no crystal structural solution or devices reported yet; but it has a band gap of 1.53–1.74 eV …”

Section: Cui–agi–bii3 Phase Spacementioning

confidence: 99%

See 1 more Smart Citation

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI₃ Phase Space by Synthesis of 3D CuAgBiI₅

et al. 2021

View full text Add to dashboard Cite

A newly reported compound, CuAgBiI 5 , is synthesized as powder, crystals, and thin films. The structure consists of a 3D octahedral Ag + /Bi 3+ network as in spinel, but occupancy of the tetrahedral interstitials by Cu + differs from those in spinel. The 3D octahedral network of CuAgBiI 5 allows us to identify a relationship between octahedral site occupancy (composition) and octahedral motif (structure) across the whole CuI–AgI–BiI 3 phase field, giving the ability to chemically control structural dimensionality. To investigate composition–structure–property relationships, we compare the basic optoelectronic properties of CuAgBiI 5 with those of Cu 2 AgBiI 6 (which has a 2D octahedral network) and reveal a surprisingly low sensitivity to the dimensionality of the octahedral network. The absorption onset of CuAgBiI 5 (2.02 eV) barely changes compared with that of Cu 2 AgBiI 6 (2.06 eV) indicating no obvious signs of an increase in charge confinement. Such behavior contrasts with that for lead halide perovskites which show clear confinement effects upon lowering dimensionality of the octahedral network from 3D to 2D. Changes in photoluminescence spectra and lifetimes between the two compounds mostly derive from the difference in extrinsic defect densities rather than intrinsic effects. While both materials show good stability, bulk CuAgBiI 5 powder samples are found to be more sensitive to degradation under solar irradiation compared to Cu 2 AgBiI 6 .

show abstract

Section: Cui–agi–bii 3 Phase Spacementioning

confidence: 99%

Section: Cui–agi–bii3 Phase Spacementioning

confidence: 99%

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI₃ Phase Space by Synthesis of 3D CuAgBiI₅

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Cu 2 BiI 5 . [ 67 ] Ramachandran et al [ 71 ] recently synthesized and characterized thin films of this compound, which was found to have a hexagonal structure close to that of CdCl 2 .…”

Section: Crystal Structures and Compositionsmentioning

confidence: 99%

“…In turn, polycrystalline thin films of these materials have been fabricated using various deposition strategies, such as spin‐coating, [ 66,68 ] direct metal surface elemental reaction (DMSER), [ 101,102 ] and coevaporation. [ 71,103 ] In regard to optoelectronic devices, the material and film qualities are critical, as they affect the series and shunt resistances, carrier generation and extraction, recombination processes, and photon detection sensitivity. While phase‐pure crystal growth commonly requires synthesis optimization or modification to attain a critical saturation point and nucleation, the film quality and coverage can be improved by accessing reliable and scalable solution‐ or vapor‐based thin‐film formation strategies.…”

Section: Synthesis and Thin‐film Depositionmentioning

confidence: 99%

“…demonstrated a solution‐process + thermal evaporation strategy to obtain phase‐pure Cu 2 BiI 5 films. [ 71 ] In this approach, BiI 3 film was produced by spin‐coating a high concentration (1 m ) precursor solution in DMF and then used as a substrate for evaporation of copper under a high vacuum. After postannealing at 100 °C for 30 min, the films promote Cu diffusion and thereby Cu 2 BiI 5 formation; additionally, an increase in the thickness of the Cu layer (from 50 nm to 100 nm) improves the compactness of the films.…”

Section: Synthesis and Thin‐film Depositionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Recent Progress and Challenges of Bismuth‐Based Halide Perovskites for Emerging Optoelectronic Applications

Chen

Jia

et al. 2022

Advanced Optical Materials

View full text Add to dashboard Cite

Recently, the lead-halide perovskites have aroused great interest for advanced optoelectronic applications due to their excellent optoelectronic characteristics including large light absorption coefficients, high charge carrier mobility, prolonged charge carrier lifetime, large carrier diffusion lengths, outstanding defects tolerance, and low-cost solution processability. [1][2][3][4] In 2009, Miyasaka and co-workers initially used the perovskites as absorbers in photovoltaic devices, and obtained a power conversion efficiency (PCE) of 3.8%. [5] Within a short period of a decade, the maximum certified PCE of single-cell perovskite-based photovoltaic devices has reached 25.8%, which is comparable to that of the commercial crystalline Si solar cells. [6] Besides the photovoltaic devices, [7][8][9] the perovskites also have been applied to the photodetectors, [10,11] photocatalysis, [12,13] field-effect transistors, [14,15] light-emitting diodes (LEDs), [16][17][18][19] X-ray imaging, [20][21][22] lasing, [23,24] and so on. Despite a series of impressive advances achieved in above fields, the practical industrialization of these emerging technologies still suffers from two thorny issues, namely, the lead toxicity and the poor stability against light, heat, and humidity. [25][26][27] Thus, searching for less-or nontoxicity and environmentally stable perovskites with similar optoelectronic properties of lead-halide perovskites would be an emerging and effective pace for the commercial applications.Based on the previous researches, the excellent optoelectronic properties of Pb-based perovskite materials originate from the unique atomic electronic configuration with lone-pair Pb 6s 2 electrons and an empty Pb 6p orbital, as well as its large size and heavy mass, contributing to a strong spin-orbit coupling. [28][29][30] Therefore, the stable and nontoxic substitutes of Pb element should have the similar atomic electronic configuration. Theoretically, the most suitable choice for Pb replacement is to use the group-14 metal elements with the same lone-pair s orbitals as Pb, such as tin (Sn) and germanium (Ge). [31][32][33] However, Sn-and Ge-based perovskites show very poor stability because of the rapid oxidation of Sn 2+ and Ge 2+ to +4 states. Furthermore, Sn might be even more toxic than Pb for human beings upon dispersion into the environment.Recently, metal halide perovskites have attracted extensive attentions owing to their superior optoelectronic properties in various device applications, such as solar cells, photodetectors, light-emitting diodes, lasing, photocatalysis, etc. Up to now, the state-of-the-art developments of perovskite-based devices are most using the lead-halide perovskite system. However, the presence of lead (Pb) in these devices, which is insidious bioaccumulative hazard to human bodies, and a poor stability against light, heat, and humidity hamper their practical applications and future commercialization. Therefore, the scientific community is searching for low-toxicity and environmentalfriend...

show abstract

Development of lead-free Cu2BiI5 rudorffite thin films for visible light photodetector application

Cited by 11 publications

References 37 publications

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI₃ Phase Space by Synthesis of 3D CuAgBiI₅

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI₃ Phase Space by Synthesis of 3D CuAgBiI₅

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

Recent Progress and Challenges of Bismuth‐Based Halide Perovskites for Emerging Optoelectronic Applications

Contact Info

Product

Resources

About

Development of lead-free Cu2BiI5 rudorffite thin films for visible light photodetector application

Cited by 11 publications

References 37 publications

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI3 Phase Space by Synthesis of 3D CuAgBiI5

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI3 Phase Space by Synthesis of 3D CuAgBiI5

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

Recent Progress and Challenges of Bismuth‐Based Halide Perovskites for Emerging Optoelectronic Applications

Contact Info

Product

Resources

About

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI₃ Phase Space by Synthesis of 3D CuAgBiI₅

Chemical Control of the Dimensionality of the Octahedral Network of Solar Absorbers from the CuI–AgI–BiI₃ Phase Space by Synthesis of 3D CuAgBiI₅