Multifunctional Regioisomeric Passivation Strategy for Fabricating Self-Driving, High Detectivity All-Inorganic Perovskite Photodetectors

Wang, Yong; Ye, Shuming; Sun, Ziwei; Zhu, Jiajun; Liu, Ye; Wang, Rongfei; Lin, Feng; Zhang, Wenhua; Yang, Yu; Wang, Chong

doi:10.1021/acsami.3c12714

Cited by 7 publications

(3 citation statements)

References 53 publications

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“…Among the three devices, the IPA-BAI PD obtained the highest maximum R of 0.41 A W –1 around 630 nm. The specific detectivity ( D* ) represents the detection sensitivity of PDs, which can be calculated by the equation . The PD based on IPA-BAI realized the highest D* of 1.01 × 10 13 Jones without a bias voltage in comparison with 2.63 × 10 12 Jones for the control PD and 5.95 × 10 12 Jones for ACN-BAI PD (Figure e).…”

Section: Results and Discussionmentioning

confidence: 99%

Modulating Dimensionality of 2D Perovskite Layers for Efficient and Stable 2D/3D Perovskite Photodetectors

Lai,

Liu,

Zhou

et al. 2024

ACS Appl. Mater. Interfaces

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perovskites have been widely adopted for improving the performance and stability of three-dimensional (3D) metal halide perovskite devices. However, rational manipulation of the phase composition of 2D perovskites for suitable energy level alignment in 2D/3D perovskite photodetectors (PDs) has been rarely explored. Herein, we precisely controlled the dimensionality of the 2D perovskite on CsPbI 2 Br films by tuning the polarity of the n-butylammonium iodide (BAI)-based solvents. In comparison to the pure n = 1 2D perovskite (ACN-BAI) formed by acetonitrile treatment, a mixture of n = 1 and n = 2 phases (IPA-BAI) generated by isopropanol (IPA) treatment guaranteed more robust defect passivation and favorable energy level alignment at the perovskite/hole transport layer interface. Consequently, the IPA-BAI PD exhibited a responsivity of 0.41 A W −1 , a detectivity of 1.01 × 10 13 Jones, and a linear dynamic range of 120 dB. Furthermore, the mixedphase 2D layer effectively shielded the 3D perovskite from moisture. The IPA-BAI device retained 76% of its initial responsivity after 500 h of nonencapsulated storage at 10% relative humidity. This research provides valuable insights into the dimensional modulation of 2D perovskites for further enhancing the performance of 2D/3D perovskite PDs.

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Section: Results and Discussionmentioning

confidence: 99%

Modulating Dimensionality of 2D Perovskite Layers for Efficient and Stable 2D/3D Perovskite Photodetectors

Lai,

Liu,

Zhou

et al. 2024

ACS Appl. Mater. Interfaces

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“…This, in turn, compromises the noise performance of the device. The implementation of surface passivation techniques , is anticipated to alleviate the dark current in the device, leading to an improved device performance.…”

Section: Resultsmentioning

confidence: 99%

Uncooled Broadband Photodetection via Light Trapping in Conformal PtTe₂–Silicon Nanopillar Heterostructures

Wu,

Nie,

Sun

et al. 2024

ACS Appl. Mater. Interfaces

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Dirac semimetals have demonstrated significant attraction in the field of optoelectronics due to their unique bandgap structure and high carrier mobility. Combining them with classical semiconductor materials to form heterojunctions enables broadband optoelectronic conversion at room temperature. However, the low light absorption of layered Dirac semimetals substantially limits the device's responsivity in the infrared band. Herein, a three-dimensional (3D) heterostructure, composed of silicon nanopillars (SiNPs) and a conformal PtTe 2 film, is proposed and demonstrated to enhance the photoresponsivity for uncooled broadband detection. The light trapping effect in the 3D heterostructure efficiently promotes the interaction between light and PtTe 2 , while also enhancing the light absorption efficiency of silicon, which enables the enhancement of the device responsivity across a broadband spectrum. Experimentally, the PtTe 2 -SiNPs heterojunction device demonstrates excellent photoelectric conversion behavior across the visible, near-infrared, and long-wave infrared (LWIR) bands, with its responsivity demonstrating an order-of-magnitude improvement compared to the counterparts with planar silicon heterojunctions. Under 11 μm laser irradiation, the noise equivalent power (NEP) can reach 1.76 nW•Hz −1/2 (@1 kHz). These findings offer a strategic approach to the design and fabrication of high-performance broadband photodetectors based on Dirac semimetals.

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“…Currently, numerous research studies indicate that the composite structure of CsPb 2 Br 5 and CsPbBr 3 perovskites holds potential advantages for addressing the performance degradation of CsPbX 3 perovskites caused by external factors. − The fabrication of multidimensional composite films by vapor deposition as a common method could prevent the impact of solvents on the solubility of the underlying thin film. , This method is suitable for fabricating dual-phase composite materials of 2D CsPb 2 Br 5 and three-dimensional (3D) CsPbBr 3 . − Moreover, the majority of perovskite devices are made using thin film structures. The defects and grain boundaries present in these films frequently result in subpar optoelectronic performance of perovskite thin film devices. − Compared to bulk or planar materials, nanowires provide a larger surface area that facilitates more efficient light absorption. Moreover, the constraints imposed by the wire-like structure enable better control of the direction of charge carrier transport, thereby reducing potential losses during exciton transport. , For example, Shin et al introduced CsPbBr 3 –CsPb 2 Br 5 biphasic perovskite nanowires as an interlayer in perovskite solar cells, achieving effective charge carrier transport within the device.…”

Section: Introductionmentioning

confidence: 99%

Nanometer-Thick CsPbBr₃ Films with Embedded CsPb₂Br₅ Nanowires for Photodetector Applications

Sun,

Wang,

Liu

et al. 2024

ACS Appl. Nano Mater.

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All-inorganic perovskite materials have gained enormous attention in photodetectors (PDs) due to their high charge carrier mobility, cost-effectiveness, and tunable bandgap. However, instability and corresponding performance degradation of perovskite PDs when exposed to surrounding humidity persist as challenges. In this work, a composite PD was fabricated by combining CsPb2Br5 nanowires and CsPbBr3 thin-film perovskites as an example to address these problems. The CsPb2Br5 nanowires were prepared by a facile water-bath method to improve the water resistance, and the subsequent evaporation of the CsPbBr3 film formed a type-I heterostructure to enhance its photosensitivity of PDs. As a result, the device exhibits a 10 times higher responsivity of 206 mA/W than that of the bare CsPbBr3 thin film device and maintains 92.85% of its original detectivity after being exposed to a humid environment (RH = 75%) for 144 h. Furthermore, the corresponding fundamental characterization was also performed to reveal the role of CsPb2Br5 nanowires in enhancing the overall performance of the PD. This work provides a simple and efficient approach to enhancing the durability and performance of all-inorganic halide perovskite devices through the embedding of CsPb2Br5 perovskite nanowires.

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Multifunctional Regioisomeric Passivation Strategy for Fabricating Self-Driving, High Detectivity All-Inorganic Perovskite Photodetectors

Cited by 7 publications

References 53 publications

Modulating Dimensionality of 2D Perovskite Layers for Efficient and Stable 2D/3D Perovskite Photodetectors

Modulating Dimensionality of 2D Perovskite Layers for Efficient and Stable 2D/3D Perovskite Photodetectors

Uncooled Broadband Photodetection via Light Trapping in Conformal PtTe₂–Silicon Nanopillar Heterostructures

Nanometer-Thick CsPbBr₃ Films with Embedded CsPb₂Br₅ Nanowires for Photodetector Applications

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Multifunctional Regioisomeric Passivation Strategy for Fabricating Self-Driving, High Detectivity All-Inorganic Perovskite Photodetectors

Cited by 7 publications

References 53 publications

Modulating Dimensionality of 2D Perovskite Layers for Efficient and Stable 2D/3D Perovskite Photodetectors

Modulating Dimensionality of 2D Perovskite Layers for Efficient and Stable 2D/3D Perovskite Photodetectors

Uncooled Broadband Photodetection via Light Trapping in Conformal PtTe2–Silicon Nanopillar Heterostructures

Nanometer-Thick CsPbBr3 Films with Embedded CsPb2Br5 Nanowires for Photodetector Applications

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Product

Resources

About

Uncooled Broadband Photodetection via Light Trapping in Conformal PtTe₂–Silicon Nanopillar Heterostructures

Nanometer-Thick CsPbBr₃ Films with Embedded CsPb₂Br₅ Nanowires for Photodetector Applications