Photosensitivity of the PbS Colloidal Quantum Dot-Based Nanostructures with an Energy Barrier

IF 0.6 4区物理与天体物理 Q4 MECHANICS

Doklady Physics Pub Date : 2024-02-15 DOI:10.1134/S1028335823070066

V. S. Popov, V. P. Ponomarenko, D. V. Dymkin, I. A. Shuklov, A. V. Gadomska, S. B. Brichkin, N. A. Lavrentiev, V. U. Gak, A. E. Mirofyanchenko, E. V. Mirofyanchenko, A. V. Katsaba, P. V. Arsenov, V. V. Ivanov, V. F. Razumov

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Abstract

A new architecture of photosensitive elements for the near- (0.7–1.4 μm) and short-wavelength (1.4–3.0 μm) infrared spectral ranges is proposed, which is based on hybrid nanostructures consisting of PbS colloidal quantum dots and ZnO and silver nanowire functional layers. Small-sized (12 × 12 μm) photosensitive elements with an energy barrier at the contact between layers of colloidal quantum dots with n- and p‑type conductivity have been studied. The I‒V characteristics, spectral dependences of optical absorption, and relative spectral photosensitivity S_i(λ)/S_i(λ_max) of the barrier structures at room temperature have been examined. It is shown that the proposed architecture of the barrier structures ensures the photosensitivity in a wide spectral range from 0.4 to 2.0 µm. An excess of the average value of the relative spectral sensitivity S_i(λ)/S_i(λ_max) by a factor of about 1.5 as compared with the values observed previously for the PbS colloidal quantum dot barrier nanostructures in the wavelength range of 0.9–1.85 μm has been found.

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具有能量势垒的 PbS 胶体量子点纳米结构的光敏性

摘要提出了一种用于近（0.7-1.4 μm）和短波长（1.4-3.0 μm）红外光谱范围的光敏元件新结构，该结构基于由 PbS 胶体量子点和 ZnO 及银纳米线功能层组成的混合纳米结构。研究了在具有 n 型和 p 型导电性的胶体量子点层之间的接触处具有能量势垒的小尺寸（12 × 12 μm）光敏元件。研究考察了阻挡结构在室温下的 I-V 特性、光吸收的光谱依赖性和相对光谱光敏度 Si(λ)/Si(λmax)。结果表明，所提出的阻挡层结构能确保在 0.4 至 2.0 µm 的宽光谱范围内的光敏性。与之前在波长范围为 0.9-1.85 μm 的 PbS 胶体量子点势垒纳米结构中观察到的数值相比，相对光谱灵敏度 Si(λ)/Si(λmax) 的平均值超出了约 1.5 倍。

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来源期刊

Doklady Physics 物理-力学

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

4-8 weeks

期刊介绍： Doklady Physics is a journal that publishes new research in physics of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia in the form of short articles. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.