Beisembekov Meiirkhan, Aimukhanov Aitbek, Tazhibayev Serzhan, Abeuov Dosmukhammed, Zeinidenov Assylbek
Scientific Center of nanotechnology and functional nanomaterials, Buketov Karaganda University, University str., 28, Karaganda, 100028, Kazakhstan.
Small. 2025 Aug;21(33):e2501794. doi: 10.1002/smll.202501794. Epub 2025 Jun 23.
This study demonstrates that the use of bilayer films based on nickel oxide (NiO;) and cobalt phthalocyanine (CoPc) represents a promising hole transport layer (HTLs) for inverted perovskite solar cells (PSCs). NiO; films are fabricated using the spin-coating method from a sol-gel solution. Films (CoPc) and nanowires (CoPc) on the NiO; surface are produced by thermal sputtering and physical gradient-temperature vapor deposition. It is demonstrated that PSCs with a NiO; layer exhibit a power conversion efficiency (PCE) of only 18,1%. The incorporation of a CoPc intermediate layer between NiO; and the perovskite increases the PCE to 19.1%. The highest PCE, reaching 20.7%, is achieved with a bilayer HTLs based on NiO;/CoPc. Analysis of the PSC impedance spectra shows that the CoPc intermediate layer reduces the HTLs resistance and increases the recombination resistance at the perovskite/HTLs interface, which extends the effective lifetime of charge carriers. The stability of NiO;-based PSCs is 48%, while PSCs with bilayer HTLs based on NiO;/CoPc and NiO;/CoPc exhibits higher stability of 71% and 90% over 600 hours. The results demonstrated that solar cells based on NiO;/CoPc inhibit the perovskite degradation process and reduce charge recombination, thereby improving the performance and stability of the inverted PSCs.
本研究表明，基于氧化镍（NiO;）和钴酞菁（CoPc）的双层薄膜是一种很有前途的用于倒置钙钛矿太阳能电池（PSC）的空穴传输层（HTL）。NiO;薄膜通过旋涂法由溶胶 - 凝胶溶液制备而成。NiO;表面的薄膜（CoPc）和纳米线（CoPc）通过热溅射和物理梯度温度气相沉积法制备。结果表明，具有NiO;层的PSC的功率转换效率（PCE）仅为18.1%。在NiO;和钙钛矿之间引入CoPc中间层可将PCE提高到19.1%。基于NiO;/CoPc的双层HTL实现了最高的PCE，达到20.7%。对PSC阻抗谱的分析表明，CoPc中间层降低了HTL电阻，并增加了钙钛矿/HTL界面处的复合电阻，从而延长了电荷载流子的有效寿命。基于NiO;的PSC的稳定性为48%，而基于NiO;/CoPc和NiO;/CoPc双层HTL的PSC在600小时内表现出更高的稳定性，分别为71%和90%。结果表明，基于NiO;/CoPc的太阳能电池抑制了钙钛矿的降解过程并减少了电荷复合，从而提高了倒置PSC的性能和稳定性。
