Scholarlink

<p>This study examines the role of polyaniline (PANI) as a surface passivation material in enhancing the performance of lead-free Cs<sub>2</sub>AgBiBr<sub>6</sub>-based halide double perovskite solar cells (LFHDPs). A structural analysis using X-ray diffraction (XRD) confirms a cubic crystalline form, with a PANI integration increasing the crystallinity and enlarging the grain size from 26 to 31&#xa0;nm. The expansion in inter-planar spacing is linked to an improved interfacial charge transport. Optical assessments reveal a lowered bandgap energy (<i>E</i><sub><i>g</i></sub>) from 1.88 to 1.85&#xa0;eV, alongside a substantial increase in charge carrier lifetime from 2.95 to 19.5&#xa0;ns with the PANI incorporation. The current density–voltage (J-V) demonstrates a superior photovoltaic performance, including a short-circuit current density (<i>J</i><sub>sc</sub>) of 5.1&#xa0;mA·cm⁻<sup>2</sup>, an open-circuit voltage (<i>V</i><sub>oc</sub>) of 0.90&#xa0;V, and a power conversion efficiency (PCE) of 3.3%. Devices’ combination Cs<sub>2</sub>AgBiBr<sub>6</sub>/PANI/Spiro-OMeTAD show a robust humidity resistance, maintaining performance after 10&#xa0;min of exposure, unlike their PANI-free device, while also exhibiting sustained PCE stability. These advancements stem from suppressed non-radiative recombination, expanded grain dimensions, and effective passivation of grain boundaries. The results position Cs<sub>2</sub>AgBiBr<sub>6</sub>/PANI composites as viable pathways for eco-friendly, high-stability perovskite solar cells with a competitive efficiency.</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

Lead-free double perovskite solar cells with PANI passivation Cs2AgBiBr6: reducing bandgap for enhanced photovoltaic performance

  • 期刊论文

  • 发表日期：

    2025年6月26日

查看全文
  • Asad Ullah,
  • Ihtisham-ul-haq,
  • Khamael M. Abualnaja,
  • Khaled Fahmi Fawy

摘要

This study examines the role of polyaniline (PANI) as a surface passivation material in enhancing the performance of lead-free Cs2AgBiBr6-based halide double perovskite solar cells (LFHDPs). A structural analysis using X-ray diffraction (XRD) confirms a cubic crystalline form, with a PANI integration increasing the crystallinity and enlarging the grain size from 26 to 31 nm. The expansion in inter-planar spacing is linked to an improved interfacial charge transport. Optical assessments reveal a lowered bandgap energy (Eg) from 1.88 to 1.85 eV, alongside a substantial increase in charge carrier lifetime from 2.95 to 19.5 ns with the PANI incorporation. The current density–voltage (J-V) demonstrates a superior photovoltaic performance, including a short-circuit current density (Jsc) of 5.1 mA·cm⁻2, an open-circuit voltage (Voc) of 0.90 V, and a power conversion efficiency (PCE) of 3.3%. Devices’ combination Cs2AgBiBr6/PANI/Spiro-OMeTAD show a robust humidity resistance, maintaining performance after 10 min of exposure, unlike their PANI-free device, while also exhibiting sustained PCE stability. These advancements stem from suppressed non-radiative recombination, expanded grain dimensions, and effective passivation of grain boundaries. The results position Cs2AgBiBr6/PANI composites as viable pathways for eco-friendly, high-stability perovskite solar cells with a competitive efficiency.