Solution-processed, flexible and broadband photodetector based on CsPbBr3/PbSe quantum dot heterostructures

Hu, Jinming; Shen, Yang; Zhang, Zhenheng; Li, Hailong; Veeramalai, Chandrasekar Perumal; Sulaman, Muhammad; Saleem, Muhammad Imran; Tang, Yi; Jiang, Yurong; Tang, Libin; Zou, B. S.

doi:10.1016/j.jmst.2020.06.047

Cited by 47 publications

(43 citation statements)

References 43 publications

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“…Figure h depicts the PL spectra of the CsPbCl 3 and CsPbCl 3 /PbS samples deposited onto the glass substrates. It is apparent that the PbS-modified sample gets a significantly stronger PL quenching than the nonmodified counterpart, corresponding to more efficient hole injection from the CsPbCl 3 perovskite to the PbS layer. , This implies the excellent hole extraction capability of the PbS film. The slight blue-shift of the CsPbCl 3 /PbS sample reveals that the PbS modification can sufficiently bring down the trap states of the CsPbCl 3 film. , The electrochemical impedance spectroscopy (EIS) tests are conducted to get an insight into the charge transfer and recombination dynamics of the as-fabricated CsPbCl 3 photodetectors.…”

Section: Results and Discussionmentioning

confidence: 99%

Boosting the Performance of Self-Powered CsPbCl₃-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering

Zhan

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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All-inorganic CsPbCl 3 perovskite in ultraviolet (UV) detection is drawing increasing interest owing to its UVmatchable optical band gap, ultrahigh UV stability, and superior inherent optoelectronic properties. Almost all of the reported CsPbCl 3 photodetectors employ CsPbCl 3 nano-or microstructures as sensitive components, while CsPbCl 3 polycrystalline filmbased self-powered photodetectors are rarely studied on account of the terrible precursor solubility. Herein, a novel sequential vapordeposition technique is demonstrated to fabricate CsPbCl 3 polycrystalline film for the first time. High-quality CsPbCl 3 films with excellent optical, electronic, and morphological features are obtained. A self-powered photodetector based on the CsPbCl 3 film is constructed without any charge transport layer, showing a high UV detection performance. A thin p-type PbS buffer layer is further introduced to passivate the surface defects of the CsPbCl 3 layer and decrease the interfacial energy barrier by forming a type-II heterojunction, contributing to a faster hole extraction rate and a suppressed dark current level. The best-performing device achieves an ultrafast response time of 1.92 μs, an ultrahigh on/off ratio of 2.22 × 10 5 , and a responsivity of 0.22 A/W upon 375 nm UV illumination at 0 V bias. This comprehensive performance is the best among all of the CsPbCl 3 photodetectors reported to date. The as-prepared photodetectors also present an eminent UV irradiation and long-term durability in ambient air. Furthermore, a largearea and uniform 625-pixel UV image sensor is fabricated and attains a prominent imaging capability. Our work opens a new avenue for the scalable production of CsPbCl 3 -based optoelectronics.

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Section: Results and Discussionmentioning

confidence: 99%

Boosting the Performance of Self-Powered CsPbCl₃-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering

Zhan

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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“…In the case of region 3 where the QDs cannot absorb light, the transmittance reduced slightly because of the QD layers ( Figure 3 a), and there was a slight loss in the EQE. Each improvement and loss mechanism thus needs to be distinguished, and controllable variables such as the type of material or thickness of the QD layer can be optimized by follow-up studies [ 29 , 30 , 31 , 32 ]. We believe that our results not only allow improved responses in the UV regions but also improved conversion efficiencies of the CZTSSe solar cells.…”

Section: Resultsmentioning

confidence: 99%

Improving Ultraviolet Responses in Cu2ZnSn(S,Se)4 Thin-Film Solar Cells Using Quantum Dot-Based Luminescent Down-Shifting Layer

et al. 2021

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Quantum dot (QD)-based luminescent down-shifting (LDS) layers were deposited on Cu2ZnSn(S,Se)4 (CZTSSe) solar cells via the drop-casting method. The LDS layers can easily widen the narrow absorption wavelength regions of single-junction solar cells and enable improvement of the short-circuit current. The optical properties of LDS layers deposited on glass and containing different QD contents were analyzed based on their transmittance, reflectance, and absorbance. The absorber films to be used in the CZTSSe solar cells were determined by X-ray diffraction measurements and Raman spectroscopy to determine their crystal structures and secondary phases, respectively. The completed CZTSSe solar cells with LDS layers showed increased ultraviolet responses of up to 25% because of wavelength conversion by the QDs. In addition, the impact of the capping layer, which was formed to protect the QDs from oxygen and moisture, on the solar cell performance was analyzed. Thus, a maximal conversion efficiency of 7.3% was achieved with the 1.0 mL QD condition; furthermore, to the best of our knowledge, this is the first time that LDS layers have been experimentally demonstrated for CZTSSe solar cells.

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“…Organic-inorganic hybrid halide perovskites are emerging as attractive optoelectronic materials for solar cells, [1][2][3] light-emitting diodes [4][5][6][7][8][9] and photodetectors [9][10][11][12][13] due to their excellent facile fabrication strategies, long carrier diffusion lengths, and high charge carrier mobilities. All currently reported high-performance perovskite optoelectronics are primarily based on Pb-based perovskites.…”

Section: Introductionmentioning

confidence: 99%

“…All currently reported high-performance perovskite optoelectronics are primarily based on Pb-based perovskites. 1,2,4,5,[9][10][11][12][13][14] However, toxic Pb has caused serious concern due to its environmental impact, and the toxic mixture of dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO) can also harm human health and the environment seriously. 15 In order to eliminate the toxicity of Pb from the environment, Pb 2+ can be replaced by lower-toxicity cations, such as Sn 2+ , Ge 2+ , Bi 3+ or Sb 3+ .…”

Section: Introductionmentioning

confidence: 99%

One-pot synthesis of novel ligand-free tin(ii)-based hybrid metal halide perovskite quantum dots with high anti-water stability for solution-processed UVC photodetectors

Zhang

Yang

et al. 2022

Nanoscale

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Solution-processed, flexible and broadband photodetector based on CsPbBr3/PbSe quantum dot heterostructures

Cited by 47 publications

References 43 publications

Boosting the Performance of Self-Powered CsPbCl₃-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering

Boosting the Performance of Self-Powered CsPbCl₃-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering

Improving Ultraviolet Responses in Cu2ZnSn(S,Se)4 Thin-Film Solar Cells Using Quantum Dot-Based Luminescent Down-Shifting Layer

One-pot synthesis of novel ligand-free tin(ii)-based hybrid metal halide perovskite quantum dots with high anti-water stability for solution-processed UVC photodetectors

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Solution-processed, flexible and broadband photodetector based on CsPbBr3/PbSe quantum dot heterostructures

Cited by 47 publications

References 43 publications

Boosting the Performance of Self-Powered CsPbCl3-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering

Boosting the Performance of Self-Powered CsPbCl3-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering

Improving Ultraviolet Responses in Cu2ZnSn(S,Se)4 Thin-Film Solar Cells Using Quantum Dot-Based Luminescent Down-Shifting Layer

One-pot synthesis of novel ligand-free tin(ii)-based hybrid metal halide perovskite quantum dots with high anti-water stability for solution-processed UVC photodetectors

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Boosting the Performance of Self-Powered CsPbCl₃-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering

Boosting the Performance of Self-Powered CsPbCl₃-Based UV Photodetectors by a Sequential Vapor-Deposition Strategy and Heterojunction Engineering