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Synthesis methods of NiOx nanoparticles and its effect on hole conductivity and stability of n-i-p perovskite solar cells
Synthetic Metals ( IF 4.0 ) Pub Date : 2022-06-24 , DOI: 10.1016/j.synthmet.2022.117115
Samane Pirzad Ghias Abadi , Mahmood Borhani Zarandi , Naser Jahanbakhshi Zadeh

Herein, nickel oxide nanoparticles (NPs) with different routes were synthesized and used as HTLs for MAPbI3-based PSCs. UV-Vis absorption spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), steady-state photoluminescence (PL) spectra, space-charge limited current (SCLC) model, water droplet contact angle and current voltage (I-V) measurements were used to investigate the characteristics of synthesized NiOx, photovoltaic parameters and stability of constructed n-i-p perovskite solar cells. It was found that employing nickel chloride hexahydrate (NiCl2·6H2O) (labeled as NiCl2) as Ni reagent in the synthesis process could be obtained more desirable NiOx NPs for the HTL role in PSC devices. Results showed NiCl2-based NiOx HTL facilitates hole extraction to a gold electrode and suppresses electron-hole recombination rate in PSCs. NiCl2-based NiOx HTL brings a champion power conversion efficiency (PCE) of 12.57% for PSCs, higher than HTL-free PSCs with a champion PCE of 6.78%. In addition, the stability of NiOx-containing PSCs was considerably higher than that of a device without NiOx HTL. NiCl2-based PSC maintained 86% of its initial PCE after keeping in ambient air (25–40% RH) for 45 days, outperforming the control device that only retained ∼ 48% of its initial PCE after 25 days of the stability test. This work provides a deep understanding for efficiency and stability of the NiOx based perovskite solar cells and an approach to improve the using of low-cost HTLs.



中文翻译:

NiOx纳米粒子的合成方法及其对nip钙钛矿太阳能电池空穴电导率和稳定性的影响

在此,合成了具有不同路线的氧化镍纳米颗粒(NPs),并将其用作基于 MAPbI 3的 PSC 的 HTL。UV-Vis吸收光谱、X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、稳态光致发光(PL)光谱、空间电荷限制电流(SCLC)模型、水滴接触角和电流电压( IV) 测量用于研究合成的 NiO x的特性、光伏参数和构建的 nip 钙钛矿太阳能电池的稳定性。发现在合成过程中采用六水氯化镍(NiCl 2 ·6H 2 O)(记为NiCl 2 )作为Ni试剂可以获得更理想的NiO xPSC 设备中 HTL 角色的 NP。结果表明,基于 NiCl 2的 NiO x HTL 有助于将空穴提取到金电极并抑制 PSC 中的电子-空穴复合率。基于NiCl 2的 NiO x HTL 为 PSC 带来了 12.57% 的冠军功率转换效率 (PCE),高于 6.78% 的冠军 PCE 的无 HTL 的 PSC。此外,含 NiO x的 PSC 的稳定性明显高于不含 NiO x HTL 的器件。氯化镍2基于 PSC 的 PSC 在环境空气(25-40% RH)中保持 45 天后保持其初始 PCE 的 86%,优于在稳定性测试 25 天后仅保持其初始 PCE 约 48% 的控制装置。这项工作为 NiO x基钙钛矿太阳能电池的效率和稳定性提供了深入的理解,并提供了一种改进低成本 HTL 使用的方法。

更新日期:2022-06-26
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