We report a unique methodology of triggering plasmonic excitations in sputtered ultrathin CIGSe films. In this approach of plasmonic excitation, secondary ion source present in the growth system instigates the formation of nanoclusters of its constituent elements, which is the source of plasmonic excitation. The formation of the nanoclusters during the growth is because of the distinct sputtering out rates of the various elements during the growth. For the verification of valence electron excitation and plasmonic oscillations, the studies performed as follows: a) investigation of electron energy loss from the ultraviolet-photoelectron spectroscopy measurements, b) quantification of the various electron energy loss contributions associated with the constituent element present in the films within the observed broad peaks in ultravoilet photoelectron spectroscopy (UPS) spectrum, c) estimation of particular plasmon contribution, i.e., particle, valence-surface, and valence-bulk plasmon at the air/thin-film interface, and within the thin film, d) verification of plasmonic behavior by analyzing different optical properties performing spectroscopic ellipsometry measurements, 5) validation of the nanocluster emergence in ultrathin CIGSe thin films deploying Field Emission Scanning Electron Microscopy. This approach is promising in terms of improving the solar cell performance parameters by supplementing the optical path length within the absorber in the broad spectral range without the need of externally supplied metal nanoparticles.

我们报告了在溅射的超薄CIGSe膜中触发等离子体激元激发的独特方法。在这种等离子体激元激发方法中，生长系统中存在的次级离子源促使其组成元素的纳米团簇形成，这是等离子体激元激发的来源。在生长过程中形成纳米团簇是由于在生长过程中各种元素的溅射速率不同。为了验证价电子激发和等离子体激元振荡，进行了如下研究：a）从紫外光电子能谱测量中研究电子能量损失，即，在空气/薄膜界面处以及薄膜内的粒子，价表面和价等离激元等离激元d）通过分析不同的光学特性，通过椭圆偏振光谱测量，验证等离激元行为； 5）验证纳米团簇场发射扫描电子显微镜技术在超薄CIGSe薄膜中的应用涌现。在不需要外部供应的金属纳米颗粒的情况下，通过在宽光谱范围内补充吸收器内的光路长度来改善太阳能电池性能参数方面，该方法是有前途的。