- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Zn1 a?? xCdxS Nanoparticles Obtained by Laser Ablation
摘要： Approximately spherical nanoparticles of the II–VI semiconductor materials Zn1 – xCdxS have been produced successfully by laser ablation of the bulk material in several liquids. The non-stabilized suspensions of particles are characterized by absorption spectroscopy and transmission electron microscopy (TEM). The procedure is not strongly size-selective, radii of 7 ± 3 nm were found for Zn1 – xCdxS by transmission electron microscopy. Acetonitrile stabilizes the particles for several days up to weeks. Prolonged irradiation leads effectively to a reduction in particles size, in which particle agglomeration may play an important role. Ablation in degassed liquids does not have a significant effect on the absorption of the suspended particles.
关键词： Zn1 – xCdxS nanoparticles,laser ablation,absorption spectroscopy,transmission electron microscopy,quantum confinement
更新于2025-09-19 17:13:59
-
Beyond 10% efficiency Cu <sub/>2</sub> ZnSnS <sub/>4</sub> solar cells enabled by modifying the heterojunction interface chemistry
摘要： Wide band gap pure sulphide kesterite Cu2ZnSnS4 is a promising environmentally friendly and low-cost photovoltaic material, which has attracted intense research interest. However, the record e?ciency of solar cells based on Cu2ZnSnS4 absorbers just overcame the benchmark 10%, being far from the e?ciency requirement for industrial-scale deployment. Recombination at the heterojunction interface accounts for a large proportion of the performance loss. Here we report a substantial improvement of the Cu2ZnSnS4 solar cell e?ciency to over 10% enabled by modifying the Cu2ZnSnS4/Zn1?xCdxS heterojunction interface. We found that the introduction of the ammonium hydroxide during the Zn1?xCdxS deposition process can lead to a signi?cant reduction of Zn related hydroxide and oxide impurities. The modi?ed chemistry environment at the heterojunction interface facilitates the decrease of interface defects and promotes the interface microstructure quality. The improved heterojunction interface with suppressed interface recombination contributes to the enhanced open circuit voltage, ?ll factor and overall device performance.
关键词： Cu2ZnSnS4,solar cells,Zn1?xCdxS,ammonium hydroxide,heterojunction interface
更新于2025-09-16 10:30:52