Coaxially enhanced photocarrier transport of a highly oriented Cu<sub>2</sub>ZnSnS<sub>4</sub>/ZnO photodetector through the nanoconfinement effect

Li, Wen; Xiong, Deping; Xie, Meilin; Luo, Chao; Zeng, Xiankan; Gao, Yue; Guo, Bin; Li, Huaming; Chun, Fengjun; Zhu, Zhihao; Fan, Xiaoqiang; Deng, Weili; Yang, Weiqing

doi:10.1039/c9tc06275k

Cited by 14 publications

(11 citation statements)

References 43 publications

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“…CZTS thin-films have been employed as photodetectors in a few studies [99][100][101], thanks to its appropriate optical properties. Singh et al observed a significant improvement in the response rise time and photocurrent across near infrared to the visible region for Na doped CZTS photodetectors compared to un-doped CZTS [99].…”

Section: Other Applications Of Cztsmentioning

confidence: 99%

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Recent Development in Earth-Abundant Kesterite Materials and Their Applications

2020

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Kesterite Cu2ZnSnS4 (CZTS) has attracted attention as an earth-abundant alternative to commercially successful CIGS solar cells. CZTS exhibits decent optoelectrical properties while having excellent stability on top of being an earth-abundant, low-cost and non-toxic material. Therefore, in recent years, there has been a significant research effort to develop CZTS-based devices. The efficiency of CZTS solar cells reached 12.6% in 2013, and this was a remarkable achievement at the time. However, the efficiency of these devices has been stagnant since then while emerging technologies, most notably perovskite solar cells, keep breaking record after record. Currently, CZTS research focuses on discovering the secrets of material properties that hinder the efficiency of CZTS solar cells while branching out to develop alternative applications for this material. In this review, we summarize the interesting properties of CZTS as well as its promising applications, which include thin-film solar cells, charge-transfer layers in perovskite solar cells, and photoelectrochemical water splitting while briefly commenting on its other possible applications.

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Section: Other Applications Of Cztsmentioning

confidence: 99%

“…In a more recent study, Li et al established a CZTS/ZnO heterojunction photodetector from vertically aligned ZnO nanorods and CZTS nanoparticles. The resulting photodetector exhibited high responsivity with fast rise and decay times [101].…”

Section: Other Applications Of Cztsmentioning

confidence: 99%

Recent Development in Earth-Abundant Kesterite Materials and Their Applications

2020

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“…13 Moreover, nanostructured devices benefit from the response performance of CZTS-based photodetectors owing to the enhanced photocarrier transport and incident photon absorption through the nanoconfinement effect. 14 Nanostructured heterojunction photodetectors with black silicon nanocones and CZTS nanocrystals demonstrate an ultrahigh photoswitching ratio of 10 5 , a very fast speed (86.8 μs), and peak responsivity and detectivity (411 mA W and 2 × 10 12 Jones, respectively). 15 Based on the efficient carrier transfer of 2D materials, self-driven CZTS/MoS 2 heterojunction photodetectors are constructed, which shows high responsivity of 141 mA W −1 , outstanding photoswitching capability (I on /I off : 112), and fast response (τ rising : 81 ms).…”

Section: ■ Introductionmentioning

confidence: 99%

High-Performance Photodetectors with an Ultrahigh Photoswitching Ratio and a Very Fast Response Speed in Self-Powered Cu₂ZnSnS₄/CdS PN Heterojunctions

Zhang

et al. 2021

ACS Appl. Electron. Mater.

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Cu 2 ZnSnS 4 (CZTS) has been extended to the field of photodetection owing to its outstanding optoelectronic properties. However, the existence of the ineluctable defects in CZTS semiconductors affects and even determines the optoelectric processes including carrier generation, relaxation, transfer, and recombination. Moreover, photoresponse correlated to the defects in CZTS photodetectors has not well been documented and the possible physics mechanism is still unexplored. High-performance and self-powered PN heterojunction photodetectors are built from Cu 2 ZnSnS 4 and CdS films. The devices exhibit a steady rectifying behavior and a prominent photovoltaic effect. The peak values of responsivity and detectivity are 220 mA W −1 and 2.69 × 10 10 Jones, respectively. A very fast response speed with rising and decay times of up to 18 and 19 μs and an ultrahigh photoswitching ratio beyond 10 4 are demonstrated in these photodetectors. An abnormal dependence of the light response parameters on the incident power and temperature is found in these devices. This anomaly is explained by the formation of the defects and/or defect dipoles, which are evidenced by the temperature dependence of the photocurrent, the dependence of the capacitance on the bias voltage at different temperatures, and the derivative of capacitance with temperature. KEYWORDS: photodetectors, Cu 2 ZnSnS 4 /CdS heterojunctions, self-powered properties, abnormal photoresponse, dependence of capacitance on the bias voltage

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“…4) Owing to suitable properties, the CZTS/Se absorber has shown promising results for broadband (Vis-NIR) detection with self-powered characteristics enabling doors toward nextgeneration optoelectronic devices. [156][157][158] The thin-film-based PD can be further improved by improving the interface quality, absorber quality, selecting optimum absorber thickness, and effective control of channel length. 5) Kesterite materials have also displayed potential capability for other applications such as sensors, TED, CO 2 reduction, and antibacterial activity.…”

Section: Discussionmentioning

confidence: 99%

“…They observed that the thin Al 2 O 3 layer acted as an electron blocking layer and efficiently decreased the carrier's recombination, which resulted in improved responsivity and decreased dark current under illumination. Li et al [ 157 ] improved carrier transport properties by introducing vertically aligned ZnO nanorods (NRs). A nanoconfinement effect resulted in highly responsive detection under visible range based on CZTS/ZnO PD.…”

Section: Applications Of Kesteritesmentioning

confidence: 99%

Potential Role of Kesterites in Development of Earth‐Abundant Elements‐Based Next Generation Technology

et al. 2021

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Recently, Cu2ZnSn(S,Se)4 (CZTSSe)‐based kesterite thin films have received growing attention in a wide variety of fields due to their suitable physico‐chemical asset nano‐ and micro‐scale. The low elemental cost, earth abundance, and environment‐friendly nature have widened the scope and made it a potential material for developing next‐generation technology. The kesterite thin films have already shown their potential in thin‐film photovoltaics (PVs) with a record efficiency of nearly 12.6%. Apart from solar cells, they have also demonstrated their widespread applicability in the field of photodetectors, gas sensors, thermoelectrics, solar water splitting, energy storage, humidity sensors, antibacterial activities, and many more. This review aims to present an overview of the advancement in the CZTSSe‐based kesterite thin films in terms of synthesis, material properties, and their use in various applications. A comprehensive review of each device application contains ongoing progress, device fabrication, and related issues. Furthermore, this review emphasizes kesterite materials and possible solutions to proposed pitfalls, thus strengthening kesterite's perspective.

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Coaxially enhanced photocarrier transport of a highly oriented Cu₂ZnSnS₄/ZnO photodetector through the nanoconfinement effect

Abstract: This work demonstrates a highly c-axis-oriented Cu2ZnSnS4/ZnO (CZTS/ZnO) photodetector with coaxially enhanced photocarrier transport.

Cited by 14 publications

References 43 publications

Recent Development in Earth-Abundant Kesterite Materials and Their Applications

Recent Development in Earth-Abundant Kesterite Materials and Their Applications

High-Performance Photodetectors with an Ultrahigh Photoswitching Ratio and a Very Fast Response Speed in Self-Powered Cu₂ZnSnS₄/CdS PN Heterojunctions

Potential Role of Kesterites in Development of Earth‐Abundant Elements‐Based Next Generation Technology

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Coaxially enhanced photocarrier transport of a highly oriented Cu2ZnSnS4/ZnO photodetector through the nanoconfinement effect

Abstract: This work demonstrates a highly c-axis-oriented Cu2ZnSnS4/ZnO (CZTS/ZnO) photodetector with coaxially enhanced photocarrier transport.

Cited by 14 publications

References 43 publications

Recent Development in Earth-Abundant Kesterite Materials and Their Applications

Recent Development in Earth-Abundant Kesterite Materials and Their Applications

High-Performance Photodetectors with an Ultrahigh Photoswitching Ratio and a Very Fast Response Speed in Self-Powered Cu2ZnSnS4/CdS PN Heterojunctions

Potential Role of Kesterites in Development of Earth‐Abundant Elements‐Based Next Generation Technology

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Coaxially enhanced photocarrier transport of a highly oriented Cu₂ZnSnS₄/ZnO photodetector through the nanoconfinement effect

High-Performance Photodetectors with an Ultrahigh Photoswitching Ratio and a Very Fast Response Speed in Self-Powered Cu₂ZnSnS₄/CdS PN Heterojunctions