Low-Cost and Flexible Anti-Reflection Films Constructed From Nano Multi-Layers of TiO₂ and SiO₂ for Perovskite Solar Cells

Abstract

We theoretically investigate the anti-reflection (AR) films based on nano multi-layers (NML) of TiO 2 and SiO 2. This kind of NML dielectric structures have the advantages of low-cost and flexible. Six kinds of transparent conductive substrate (TCS) have been studied here, which are ITO (indium tin oxide) glass, FTO (fluorine-doped tin oxide) glass, ITO PEN (polyethylene naphthalate), FTO PEN, ITO PET (polyethylene terephthalate), and FTO PET, respectively. The AR effect is about 2.3825% for FTO glass substrate, about 3.4232% for ITO glass substrate, about 5.2703% for FTO PEN substrate, about 5.0914% for ITO PEN, about 3.8584% for FTO PET, and about 4.2371% for ITO PET. In practice, this kind of AR films can be widely applicable to enhance the external quantum efficiency (EQE) of the solar cells, and then improve the power conversion efficiency (PCE). Finally, the improved PCE of perovskite solar cells based on our NML AR films is theoretically obtained. INDEX TERMS Anti-reflection, nano multi-layers, perovskite solar cells.

Full Solar-Spectrum Power-Generation System Based on High Efficiency and Wide Spectral Splitter Film and Fresnel Lens

“…In this section, the theory of thin film optics (TFO) [21] is applied to design the splitter film, which can be used to design various functions of films. Based on FTO, we have studied quantum tunneling transparent conductive films [22] and anti-reflection nano multi-layers [23,24].…”

Improving External Quantum Efficiency by Subwavelength Nano Multi-Layered Structures for Optoelectronic Devices

“…Generally, OEDs structure is based on TCSs, such as FTO (fluorine-doped tin oxide) glass, ITO (indium tin oxide) glass, FTO PEN (polyethylene naphthalate) plastic, ITO PEN, FTO PET (polyethylene terephthalate), ITO PET, and so on [1][2][3][4][5][6][7][8][9]25]. TCS is constructed of substrate and transparent conductive film.…”

“…In Ref. [25], the AR effect of the 2-nd AR is much smaller than the 1-st AR. In view of the practical fabrication of OEDs only affecting the 2-nd AR, we will focus on the need for the NML AR film of MgF2 and Ta2O5 at the interface between substrate and air.…”

“…We have studied the NML AR films of TiO2 and SiO2 in the early work [25], where two grades AR films have been investigated. The 1-st NML AR films involve the interface of substrate and air, and the 2-nd NML AR films involve the interface of transparent conductive film and substrate.…”

High Anti-Reflection Large-Scale Cup-Shaped Nano-Pillar Arrays via Thin Film Anodic Aluminum Oxide Replication

“…Therefore, the nanostructure-based anti-reflection (AR) technique emerged and has been playing an essential role ever since [ 11 , 12 ]. To date, although various nanostructured optoelectronic components and devices like solar cells [ 13 , 14 , 15 , 16 ], light-emitting diodes [ 17 , 18 , 19 , 20 ], and photodetectors [ 21 , 22 ] have been studied, the requirement of large area fabrication with nanometer-scale feature dimension FD (FD < λ /n, where λ is the light wavelength and n is the refractive index of the material under consideration) presents a bottle neck in its study and corresponding applications [ 17 , 23 , 24 , 25 ].…”