Stable perovskite based photodetector in impedance and capacitance mode

Qasuria, T. A.; Alam, Shahid; Karimov, Khasan S.; Fatima, Noshin; Al‐Harthi, Yahya; Alharbi, Hamad F.; Alharthi, Nabeel H.; Amin, Nowshad; Akhtaruzzaman, Md.

doi:10.1016/j.rinp.2019.102699

Cited by 12 publications

(11 citation statements)

References 35 publications

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“…Similar results were observed by morphological analysis of the samples through atomic force microscopy of the samples, where depositing perovskite layer over PEDOT:PSS increase the roughness of the sample resulting an increase in the surface area aiding in anti-reflection properties of the device Ref. [4] . Hence, confirming the correct selection of supporting layers.…”

Section: Resultssupporting

confidence: 79%

“…When chlorobenzene was dropped over the perovskite layer, it immediately changed from a pale yellow color to dark brown which confirms the perovskite formation as mentioned by us in Ref. [4] . Afterward, the slides were further annealed at 100 °C for an hour.…”

Section: Methodssupporting

confidence: 81%

“…5 to 8 are probably due to an increment in the reactive current which passes through the capacitor concerning the active current passes through the resistor when the illumination intensities have been increased. For further explanation of this phenomenon, the equivalent mathematical model of the sensor is presented in our previous work [4] . However, at higher frequencies, the light-impedance relationship can be explained by the frequency dependence of the mobility of the charges, which was also investigated by Prins et al [39] .…”

Section: Resultsmentioning

confidence: 99%

“…In the context of the aforementioned discussion, the present work as an extension to our previous efforts where the perovskite photodetector was characterized for its visible spectrum [4] . Here, we demonstrate the efficacy of the degraded perovskite solar cell bearing the structure illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Highly sensitive perovskite-based light detectors are extensively researched in the optoelectronic applications where detection of multicolor light is very much desired, such as day/night-time surveillance, imaging, communication, biological sensing, machine vision, and environmental monitoring [1] , [2] , [3] . Hence, it is desired to detects the ultraviolet (UV) and infrared (IR) spectrum too along with the visible spectrum as an extension to our previous efforts [4] . Although, there the perovskite solar cell was considered for visible light characterization and mesmerizing results were observed.…”

Section: Introductionmentioning

confidence: 99%

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A novel and stable ultraviolet and infrared intensity sensor in impedance/capacitance modes fabricated from degraded CH3NH3PbI3-xClx perovskite materials

Qasuria

Fatima

Karimov

et al. 2020

Journal of Materials Research and Technology

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The present situation of COVID-19 diverted our focus towards utilizing the degraded solar cells for sensor application, this will help in global energy harvesting. So, here is our successful effort to reuse already degraded solar cells as ultraviolet (UV) and infrared (IR) sensor. The spin-coated perovskite (CH 3 NH 3 PbI 3-X Cl X ) has been already tested for visible light spectrum, as an extension to that now it is utilized as UV and IR intensity sensors to cover the whole spectrum. The employed CH 3 NH 3 PbI 3-X Cl X material was used after its efficiency loss has been reached to a saturation point in photovoltaic devices. Each deposited layer was investigated from UV to the IR absorption spectrum for deepening study through UV–vis spectroscopy. In the sandwiched architecture possessing FTO/PEDOT: PSS/Perovskite/PC 61 BM/CdS/Au symmetry, the perovskite film has been employed as an absorbent layer, however, other layers participation also plays a key role. The resultant device yielded very good sensing performance because of the enhanced excitons generation which is attributed to the precise selection of the interfacial materials, e.g. CdS and PC 61 BM as an ETM and PEDOT: PSS as HTM. The impedance and capacitance of the devices within 0.01−200 kHz under varied UV and IR illumination intensities were investigated. Measurements showed that as the intensity of the light increased i.e., UV (0–200 W/m 2 ) and IR (0–5800 W/m 2 ), impedance decreased while capacitance increased. The current results are attributed to the increase in the concentration of charges i.e., electron-hole pairs generation depending on the built-in capacitance and frequency of the charges.

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Section: Resultssupporting

confidence: 79%

Section: Methodssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A novel and stable ultraviolet and infrared intensity sensor in impedance/capacitance modes fabricated from degraded CH3NH3PbI3-xClx perovskite materials

Qasuria

Fatima

Karimov

et al. 2020

Journal of Materials Research and Technology

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A Wide Bandgap Halide Perovskite Based Self‐Powered Blue Photodetector with 84.9% of External Quantum Efficiency

et al. 2022

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design of vertically stacked diode-type photodetectors (PDs) resembling the Foveon structure. [1,2] The Foveon PDs based on Si diodes were introduced in late 1999 as an alternative to the most widely used Bayer-type PDs. [3] The former consists of vertically stacked three individual detectors, which selectively absorb incident blue/green/red light along the depth of light penetration in a single pixel. In contrast, the latter consists of laterally arrayed detectors underneath dissipative color filters of blue/green/green/red where a single pixel includes a package of lateral four color filters. [4] Therefore, a vertically staked PD reduces photon loss caused by a color filter, as much as two-thirds of the total light flux in the Bayer PDs, and enables ultra-miniaturization for spatial integration. [1] However, the Foveon structure has poor detection ability for blue light, which is attributed to low absorption coefficients of Si due to its indirect transition nature. [2] A thick (≈10 µm) Si layer is required for the Foveon type because of the low absorption coefficients, which results in lengthy diffusion path, thus a low quantum efficiency in the blue region owing to severe A self-powered, color-filter-free blue photodetector (PD) based on halide perovskites is reported. A high external quantum efficiency (EQE) of 84.9%, which is the highest reported EQE in blue PDs, is achieved by engineering the A-site monovalent cations of wide-bandgap perovskites. The optimized composition of formamidinium (FA)/methylammonium (MA) increases the heat of formation, yielding a uniform and smooth film. The incorporation of Cs + ions into the FA/MA composition suppresses the trap density and increases charge-carrier mobility, yielding the highest average EQE of 77.4%, responsivity of 0.280 A W −1 , and detectivity of 5.08 × 10 12 Jones under blue light. Furthermore, Cs + improves durability under repetitive operations and ambient atmosphere. The proposed device exhibits peak responsivity of 0.307 A W −1 , which is higher than that of the commercial InGaN-based blue PD (0.289 A W −1 ). This study will promote the development of next-generation image sensors with vertically stacked perovskite PDs.

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Investigation of CsBr:BiBr3 precursor ratio concentration on cesium bismuth bromide perovskite formation

et al. 2023

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Stable perovskite based photodetector in impedance and capacitance mode

Cited by 12 publications

References 35 publications

A novel and stable ultraviolet and infrared intensity sensor in impedance/capacitance modes fabricated from degraded CH3NH3PbI3-xClx perovskite materials

A novel and stable ultraviolet and infrared intensity sensor in impedance/capacitance modes fabricated from degraded CH3NH3PbI3-xClx perovskite materials

A Wide Bandgap Halide Perovskite Based Self‐Powered Blue Photodetector with 84.9% of External Quantum Efficiency

Investigation of CsBr:BiBr3 precursor ratio concentration on cesium bismuth bromide perovskite formation

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