Heterojunction with organic thin layer for three dimensional high performance hybrid solar cells

Abstract

Hybrid solar cells based on composites of silicon nanopillar arrays (SiNPs) on silicon substrates and conjugated polymer were investigated in this study. SiNPs with three dimensional (3D) geometry could orthogonalize the directions of light absorption and charge transfer while allowing for enhanced light scattering and trapping. In addition, SiNPs were fabricated by a simple process at low temperature and displayed strong light trapping capability over a wide range of incidence angles as well as near infrared light absorption. Furthermore, a method to control the density of SiNPs had been developed to obtain pillar arrays with controllable distance, which allowed conjugated polymer to reach the bottom part of SiNPs. The thickness of organic layer played a critical role on the short-circuit current, open-circuit voltage and fill factor, and optimum thickness was indispensable to achieve the superior performance. A power conversion efficiency of 9.2% was achieved based on the heterojunction with organic thin layer under AM 1.5G illumination at 100 mW cm À2 . We believe that this model is appropriate for the fabrication of heterojunction hybrid devices based on alternative organic semiconductors or even inorganic semiconducting nanocrystals.

Carrier transport mechanisms and photodetector characteristics of Ag/TiOPc/p-Si/Al hybrid heterojunction

“…In earlier reports, it has been shown that organic and inorganic hybrid combination has complementary advantages, such as high carrier mobility and wide absorption spectrum from the inorganic side, and low temperature solution processability and low cost processability from the organic side [4,5]. Till now, most organic-inorganic hybrid structured devices were demonstrated on rigid substrates [6][7][8][9], since most inorganic materials typically need a rigid platform for their deposition or growth [1].…”

Highly Conductive PEDOT:PSS Transparent Hole Transporting Layer with Solvent Treatment for High Performance Silicon/Organic Hybrid Solar Cells

“…Several kinds of organic materials, including conjugated polymers [1][2][3][4]8], conjugated small molecules [9,10], and fullerene derivatives [11], are used as hole or electron transporting layer in hybrid solar cells. Among them, poly (3,4-ethylenedioxythiophene): polystyrene (PED-OT:PSS), a conducting polymer widely used as a hole transporting layer or metal-free electrode in organic electronic devices, has been proven to be commendable to act as a hole transporting layer in hybrid solar cells [12][13][14][15].…”

Hybrid Silicon Nanowire Devices and Their Functional Diversity

“…c) Dopamine detection on pc12 cells under hypoxic stimulation. [288] Copyright 2017, RSC. The real-time measurements show signal change when hypoxia is generated, and a comparison for different oxygen concentrations, including absence of signal change when Ca 2+ channels are blocked with cadmium ions.…”