奈米天線應用於薄膜太陽能電池吸收增強效益

Abstract

在此研究中，主要是在改變電漿奈米天線的結構優化時，會使得電漿共振產生寬頻及高吸收的響應，分別為在奈米尺度下具有特殊光學活性的金奈米天線，作為電漿子材料氮化鈦薄膜與奈米結構的製程。金奈米天線高吸收係數透過有限元素法(Finite Element Method)模擬驗證電漿子混成模態的光學特性。相較於在正向入射下的鍵結模態(Bonding Mode)，全反射色散不僅可以將入射光能量轉移至奈米天線的電漿子共振，具高吸收係數之反鍵結模態(Antibonding Mode)，對於改變材料及結構在入射波在可見波段折範圍提供吸收高靈敏度。針對氮化鈦(Titanium Nitride, TiN) 電漿子材料來結合，在可見光及近紅外光波段具有高折射率的矽奈米粒子三維週期性結構，在高溫下可實現化學性質之熱穩定，並且具有良好的寬頻超材料光吸收率。另一方面超材料和光子晶體的設計，以取得最佳的寬頻超材料吸收結構達到在高吸收、低反射之研究。

In this study, the main purpose of structural optimization in plasmonic nanoantenna is to produce plasmonic resonance with the response of broadband and high absorption, including gold and titanium (TiN) nanoantennas (NAs). The optical properties of plasmonic hybridization models of gold nanoantennas show the high absorption coefficient with the simulation in finite element method (FEM). With the bonding mode in normal incidence, the use of total reflection is not only to transfer the energy of incident light into plasmonic non-radiation resonance but also has a higher extinction coefficient. Besides, the absorption could cover all visible wavelengths by changing the materials and structures.