Enhanced device performance of Cs2AgBiBr6 double perovskite photodetector by SnO2/ZnO double electron transport layer

Shen, Wenhu; Jung, Un Suk; Xian, Zhanpeng; Jung, Bomseumin; Park, Jinsub

doi:10.1016/j.jallcom.2022.167329

Cited by 19 publications

(10 citation statements)

References 64 publications

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“…The exciton peak at around 340 nm originated from the band-edge absorption and it was proved that the intensity of this specific peak could be enhanced by the increase in bismuth doping concentration. 39 The estimated ratio of peak intensities was about 3.9, which was close to the precursor ratio but did not match the dopant concentration estimated by STEM-EDS. This could be due to the limited area of elemental analysis under microscopic observation.…”

Section: Resultsmentioning

confidence: 61%

“…The sharp absorption peak accounts for the effective absorption of photons, which is responsible for the capture of large photocurrents of the photodetectors based on 3%-doped NCs and 6%-doped NCs. The exciton peak at around 340 nm originated from the band-edge absorption and it was proved that the intensity of this specific peak could be enhanced by the increase in bismuth doping concentration . The estimated ratio of peak intensities was about 3.9, which was close to the precursor ratio but did not match the dopant concentration estimated by STEM-EDS.…”

Section: Resultsmentioning

confidence: 80%

“…The UV photodiodes are designed and fabricated based on the spin-coated double perovskite NC layers, showing high selectivity centered at 340 nm. The device exhibits high performance with photoresponsivity of 3.03 A/W and detectivity of ∼10 11 Jones, large light/dark current density ratio, and self-powered function (70 mA/W of responsivity and ∼10 9 Jones of detectivity under zero bias voltage), which compare favorably with UV photodiodes based on other double perovskite reported in the literature. − …”

Section: Introductionmentioning

confidence: 71%

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Solution-Processed UV Photodiodes Based on Cs₂Ag_0.35Na_0.65InCl₆ Perovskite Nanocrystals

Huang,

Yamada,

Sun

et al. 2023

ACS Appl. Nano Mater.

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Halide perovskites stand out as promising materials for the realization of high-performance photodetectors. However, the inherent instability and lead toxicity are still obstacles facing the wide practical application of photodetectors. In this work, the first highly responsive lead-free perovskite photodiode based on Cs 2 Ag 0.35 Na 0.65 InCl 6 nanocrystals (NCs) is demonstrated. The composition tuning strategy is introduced to enhance the device performance of photodiodes. Employed with a device structure composed of ZnO:Al electron-transport layer and poly[(9,9dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-s-butylphenyl)diphenylamine)] hole transport layer, lead-free perovskite NC photodiodes exhibit a high responsivity of 3.03 A/W and specific detectivity of 1.29 × 10 11 Jones under the illumination of a 340 nm light source. Moreover, the ultraviolet (UV) photodiodes show good performance under the self-powered mode, which exhibits a responsivity of 0.07 A/W and a specific detectivity of 5.04 × 10 10 Jones. Our work verifies the great potential of the Cs 2 Ag 0.35 Na 0.65 InCl 6 NCs in the application of environmentally friendly and highperformance UV photodiodes.

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 71%

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Solution-Processed UV Photodiodes Based on Cs₂Ag_0.35Na_0.65InCl₆ Perovskite Nanocrystals

Huang,

Yamada,

Sun

et al. 2023

ACS Appl. Nano Mater.

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“…We believe that vacuum deposition of Au electrodes on the Cs 2 AgBiBr 6 DP thin film may improve the I ON / I OFF ratio. Nevertheless, our device exhibited fast rise and fall times of ∼170 and ∼177 μs, respectively (see Figure d), which is almost 3 orders of magnitude faster than the solution-processed Cs 2 AgBiBr 6 DP thin film photodetector . Our device also showed photoresponse at 0 V bias (Figure S18, Supporting Information), thus behaving as a self-powered device with significant photocurrent without any electron/hole transport layers, which authenticates our CVD method to grow a high-quality thin film of Cs 2 AgBiBr 6 DP for practical optoelectronic device applications.…”

Section: Application As a Photodetectormentioning

confidence: 99%

Chemical Vapor Deposition Growth of Highly Stable Cs₂AgBiBr₆ Double Perovskite Thin Films and Their Ultralow Thermal Conductivity and Fast Photoresponse

Chahal,

Bora,

Giri

2023

ACS Appl. Energy Mater.

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As an alternative to lead-based perovskites, Cs 2 AgBiBr 6 is an emerging lead-free double perovskite (DP), which has shown promise in the field of optoelectronics owing to its nontoxicity, high stability, and superior photoelectric properties. Herein, we demonstrate the growth of a highly crystalline and uniform Cs 2 AgBiBr 6 thin film via chemical vapor deposition (CVD). By tuning the growth temperature, we successfully obtained Cs 2 AgBiBr 6 thin films of high structural and compositional uniformity, confirmed by XRD, Raman, and XPS studies. Substrate-dependent growth aided the study of the induced lattice strain in the system. Temperature-dependent Raman analysis of the A 1g mode was used to determine the thermal stability of the asgrown film and to estimate the temperature coefficient of the A 1g mode (α ∼ −0.01431 ± 0.0039 cm −1 K −1 ) in the Cs 2 AgBiBr 6 thin film. Power-dependent Raman spectral analysis was employed to evaluate the thermal conductivity of suspended Cs 2 AgBiBr 6 as ∼1.97 ± 0.48 W/m-K. A detailed study of the electron−phonon and phonon−phonon interactions in the Cs 2 AgBiBr 6 DP system was carried out. Additionally, due to its excellent absorption in the UV−vis region and long carrier lifetime, the CVD-grown Cs 2 AgBiBr 6 film on a SiO 2 substrate was utilized as a photodetector. The planar photodetector device, in addition to being selfpowered, exhibited a fast photoresponse of ∼170/177 μs, which is far superior to that of Cs 2 AgBiBr 6 -based photodetectors reported to date. Thus, this work paves the way for the direct CVD growth of highly compact and uniform Cs 2 AgBiBr 6 films on arbitrary substrates with exceptional thermal and environmental stability and superior optoelectronic performance. We believe that our results will eventually provide insightful strategies for developing high-performance optoelectronic devices based on lead-free inorganic double perovskites.

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“…The use of perovskite materials to improve the performance of photodetectors has been intensively studied recently. High performance perovskite-containing photosensitive elements operating in the mode of photodiodes, phototransitors and photoresistors have been demonstrated [ 36 , 37 , 38 , 39 ]. There is also an increasing number of studies considering photoconductive perovskite-containing materials as elements of artificial synapses [ 40 , 41 , 42 , 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitization of ZnO Photoconductivity in the Visible Range by Colloidal Cesium Lead Halide Nanocrystals

et al. 2022

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In this work, colloidal perovskite nanocrystals (PNCs) are used to sensitize the photoconductivity of nanocrystalline ZnO films in the visible range. Nanocrystalline ZnO with a crystallite size of 12–16 nm was synthesized by precipitation of a zinc basic carbonate from an aqueous solution, followed by annealing at 300 °C. Perovskite oleic acid- and oleylamine-capped CsPbBr3, CsPb(Cl/Br)3 and CsPb(Br/I)3 PNCs with a size of 6–13 nm were synthesized by a hot injection method at 170 °C in 1-octadecene. Photoconductive nanocomposites were prepared by applying a hexane sol of PNCs to a thick (100 μm) polycrystalline conductive ZnO layer. The spectral dependence of the photoconductivity, the dependence of the photoconductivity on irradiation, and the relaxation of the photoconductivity of the obtained nanocomposites have been studied. Sensitization of ZnO by CsPbBr3 and CsPb(Cl/Br)3 PNCs leads to enhanced photoconductivity in the visible range, the maximum of which is observed at 460 and 500 nm, respectively; close to the absorption maximum of PNCs. Nanocomposites ZnO/CsPb(Br/I)3 turned out to be practically not photosensitive when irradiated with light in the visible range. The data obtained are discussed in terms of the position of the energy levels of ZnO and PNCs and the probable PNCs photodegradation. The structure, morphology, composition, and optical properties of the synthesized nanocrystals have also been studied by XRD, TEM, and XPS. The results can be applied to the creation of artificial neuromorphic systems in the visible optical range.

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Enhanced device performance of Cs2AgBiBr6 double perovskite photodetector by SnO2/ZnO double electron transport layer

Cited by 19 publications

References 64 publications

Solution-Processed UV Photodiodes Based on Cs₂Ag_0.35Na_0.65InCl₆ Perovskite Nanocrystals

Solution-Processed UV Photodiodes Based on Cs₂Ag_0.35Na_0.65InCl₆ Perovskite Nanocrystals

Chemical Vapor Deposition Growth of Highly Stable Cs₂AgBiBr₆ Double Perovskite Thin Films and Their Ultralow Thermal Conductivity and Fast Photoresponse

Sensitization of ZnO Photoconductivity in the Visible Range by Colloidal Cesium Lead Halide Nanocrystals

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Enhanced device performance of Cs2AgBiBr6 double perovskite photodetector by SnO2/ZnO double electron transport layer

Cited by 19 publications

References 64 publications

Solution-Processed UV Photodiodes Based on Cs2Ag0.35Na0.65InCl6 Perovskite Nanocrystals

Solution-Processed UV Photodiodes Based on Cs2Ag0.35Na0.65InCl6 Perovskite Nanocrystals

Chemical Vapor Deposition Growth of Highly Stable Cs2AgBiBr6 Double Perovskite Thin Films and Their Ultralow Thermal Conductivity and Fast Photoresponse

Sensitization of ZnO Photoconductivity in the Visible Range by Colloidal Cesium Lead Halide Nanocrystals

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Solution-Processed UV Photodiodes Based on Cs₂Ag_0.35Na_0.65InCl₆ Perovskite Nanocrystals

Solution-Processed UV Photodiodes Based on Cs₂Ag_0.35Na_0.65InCl₆ Perovskite Nanocrystals

Chemical Vapor Deposition Growth of Highly Stable Cs₂AgBiBr₆ Double Perovskite Thin Films and Their Ultralow Thermal Conductivity and Fast Photoresponse