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<p>The present study analyses the impact of zinc oxide (ZnO) quantum dots as a reinforcement material to improve the performance characteristics of Poly (3-hexylthiophene) (P3HT). ZnO quantum dots are highly utilized for their excellent electron mobility and ultraviolet (UV) stability. The hybrid solar cell was fabricated using sol–gel, utilizing the spin coating technique followed by thermal annealing. The study examines varying P3HT:ZnO blend ratios (1:1, 1:2, 1:3, and 1:4) to analyze the influence of ZnO content. The results show that the 1:3 composition exhibits superior performance, with enhanced optical absorption and more effective charge separation and transportation. This composition achieved an exciton dissociation efficiency of 93% with a photo stability of 89% retention in efficiency. The optical absorption was observed as 1.0 a.u. while exhibiting balanced electron and hole mobility of 9.2 × 10<sup>–5</sup> cm<sup>2</sup>/V.s &amp; 8.6 × 10<sup>–5</sup> cm<sup>2</sup>/V.s, respectively. This optimized hybrid solar device showed short circuit power density of 10.5&#xa0;mA/cm<sup>2</sup> and open circuit voltage of 0.81&#xa0;V with the maximum power conversion efficiency of 4.7%. This superior performance arises from the combined actions of the ZnO quantum dots featured in the P3HT polymer matrix; it leads to improvements in charge separation and transport.</p>

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Improving photo-stability and exciton dissociation behaviour of zinc oxide quantum dots embedded Poly(3-hexylthiophene) hybrid solar cell

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • R. Meenakshi Reddy,
  • N. Nagabhooshanam,
  • Prahalad Singh Parihar,
  • Nilesh Bhosle,
  • S. Supriya,
  • V. S. N. Kumar,
  • Ramya Maranan,
  • T. Thirugnanasambandham,
  • S. Sathiyamurthy

摘要

The present study analyses the impact of zinc oxide (ZnO) quantum dots as a reinforcement material to improve the performance characteristics of Poly (3-hexylthiophene) (P3HT). ZnO quantum dots are highly utilized for their excellent electron mobility and ultraviolet (UV) stability. The hybrid solar cell was fabricated using sol–gel, utilizing the spin coating technique followed by thermal annealing. The study examines varying P3HT:ZnO blend ratios (1:1, 1:2, 1:3, and 1:4) to analyze the influence of ZnO content. The results show that the 1:3 composition exhibits superior performance, with enhanced optical absorption and more effective charge separation and transportation. This composition achieved an exciton dissociation efficiency of 93% with a photo stability of 89% retention in efficiency. The optical absorption was observed as 1.0 a.u. while exhibiting balanced electron and hole mobility of 9.2 × 10–5 cm2/V.s & 8.6 × 10–5 cm2/V.s, respectively. This optimized hybrid solar device showed short circuit power density of 10.5 mA/cm2 and open circuit voltage of 0.81 V with the maximum power conversion efficiency of 4.7%. This superior performance arises from the combined actions of the ZnO quantum dots featured in the P3HT polymer matrix; it leads to improvements in charge separation and transport.