Scholarlink

<p>Quantum dot (QD) solar cells are promising for enhancing photovoltaic performance by improving light harvesting and charge carrier dynamics. This study introduces TiO<sub>2</sub> quantum dots (QDs) as a novel UV-absorbing top layer in tandem solar cells—selected for their wide, tunable bandgap (~ 3.7&#xa0;eV), high photostability, non-toxicity, and compatibility with mesoporous TiO<sub>2</sub> transport layers. Unlike traditional absorbers, TiO<sub>2</sub> 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 TiO<sub>2</sub> QDs exhibited a crystallite size of ~ 5.02&#xa0;nm and strong UV absorption peaks at 360 and 378&#xa0;nm. The fabricated cell achieved a PCE of 4.68%, V<sub>oc</sub> of 0.77&#xa0;V, J<sub>sc</sub> of 7.43&#xa0;mA/cm<sup>2</sup>, 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 TiO<sub>2</sub> QDs as a low-cost, stable, and functionally distinct material in next-generation multi-junction photovoltaics.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

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

  • 期刊论文

  • 发表日期：

    2025年5月24日

查看全文
  • Abir Jana,
  • Komal Kumari,
  • Bhaskar Gupta,
  • Subir Kumar Sarkar

摘要

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%, Voc of 0.77 V, Jsc 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