Quantum dot metal oxide for UV ray utilization in tandem solar cell

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical and Quantum Electronics Pub Date : 2025-05-24 DOI:10.1007/s11082-025-08241-w

Abir Jana, Komal Kumari, Bhaskar Gupta, Subir Kumar Sarkar

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引用次数: 0

Abstract

Quantum dot (QD) solar cells are promising for enhancing photovoltaic performance by improving light harvesting and charge carrier dynamics. This study introduces TiO₂ quantum dots (QDs) as a novel UV-absorbing top layer in tandem solar cells—selected for their wide, tunable bandgap (~ 3.7 eV), high photostability, non-toxicity, and compatibility with mesoporous TiO₂ transport layers. Unlike traditional absorbers, TiO₂ QDs target the underutilized UV spectrum, acting both as a power-generating absorber and a protective optical filter. Synthesized via a low-cost sol–gel method, the TiO₂ QDs exhibited a crystallite size of ~ 5.02 nm and strong UV absorption peaks at 360 and 378 nm. The fabricated cell achieved a PCE of 4.68%, V_oc of 0.77 V, J_sc of 7.43 mA/cm², and FF of 65.51%. Though modest in standalone efficiency, the proposed architecture demonstrates a strategic approach to enhance tandem cell performance, where even a 1–2% gain from UV harvesting can be impactful at large scale. This work uniquely positions TiO₂ QDs as a low-cost, stable, and functionally distinct material in next-generation multi-junction photovoltaics.

Graphical abstract

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紫外在串联太阳能电池中的应用

量子点（QD）太阳能电池通过改善光捕获和载流子动力学来提高光伏性能。本研究介绍了TiO2量子点（QDs）作为串联太阳能电池的新型紫外吸收顶层，其选择具有宽，可调带隙（~ 3.7 eV），高光稳定性，无毒性以及与介孔TiO2传输层的相容性。与传统吸收剂不同，TiO2量子点针对未充分利用的紫外光谱，既可以作为发电吸收剂，又可以作为保护滤光片。通过低成本溶胶-凝胶法合成的TiO2量子点的晶粒尺寸为~ 5.02 nm，在360和378 nm处有很强的紫外吸收峰。该电池的PCE为4.68%，Voc为0.77 V， Jsc为7.43 mA/cm2， FF为65.51%。虽然独立效率不高，但所提出的架构展示了一种提高串联电池性能的战略方法，其中即使从紫外线收集中获得1-2%的增益也可以在大规模上产生影响。这项工作将TiO2量子点定位为下一代多结光伏电池中低成本、稳定和功能独特的材料。图形抽象

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来源期刊

Optical and Quantum Electronics 工程技术-工程：电子与电气

CiteScore

4.60

自引率

20.00%

发文量

810

审稿时长

3.8 months

期刊介绍： Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest. Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.