Structural variations of Si1−xCx and their light absorption controllability
نویسندگان
چکیده
The emergence of third-generation photovoltaics based on Si relies on tunable bandgap materials with embedded nanocrystalline Si. One of the most promising approaches is based on the mixed-phase Si1 - xCx. We have investigated the light absorption controllability of nanocrystalline Si-embedded Si1 - xCx produced by thermal annealing of the Si-rich Si1 - xCx and composition-modulated superlattice structure. In addition, stoichiometric SiC was also investigated to comparatively analyze the characteristic differences. As a result, it was found that stoichiometric changes of the matrix material and incorporation of oxygen play key roles in light absorption controllability. Based on the results of this work and literature, a design strategy of nanocrystalline Si-embedded absorber materials for third-generation photovoltaics is discussed.
منابع مشابه
SiC formation for a solar cell passivation layer using an RF magnetron co-sputtering system
In this paper, we describe a method of amorphous silicon carbide film formation for a solar cell passivation layer. The film was deposited on p-type silicon (100) and glass substrates by an RF magnetron co-sputtering system using a Si target and a C target at a room-temperature condition. Several different SiC [Si1-xCx] film compositions were achieved by controlling the Si target power with a f...
متن کاملThermal Stability and Substitutional Carbon Incorporation far above Solid- Solubility in Si1-xCx and Si1-x-yGexCy Layers Grown by Chemical Vapor Deposition using Disilane
Abstract Growth conditions for epitaxy of Si1-x-yGexCx and Si1-xCx alloy layers on (100) silicon substrates by rapid thermal chemical vapor deposition (RTCVD) with disilane as the silicon source gas are described and the Si1-xCx conditions are compared to previously reported RTCVD growth conditions for epitaxy of Si1-xCx using silane as the source gas. The thermal stability of the layers at 850...
متن کاملStructural, electrical and photovoltaic characterization of Si nanocrystals embedded SiC matrix and Si nanocrystals/c-Si heterojunction devices
Thin films of Si nanocrystals (Si NCs) embedded in a silicon carbide (SiC) matrix (Si-NC:SiC) were prepared by alternating deposition of Si-rich silicon carbide (Si1 xCx) and near-stoichiometric SiC mutilayers (Si1 xCx/SiC) using magnetron cosputtering followed by a post-deposition anneal. Transmission electron microscopy and Raman spectroscopy revealed that the Si NCs were clearly established,...
متن کاملStudy of Energy Absorption in Automobile Light Weight Composites Subjected to Impact: Numerical-Experimental
Automobile light weight structural composites are subjected to the various loadings in their service lives. Honeycombs are increasingly used as core structures in automobile light weight structures as energy absorbers. In this paper the energy absorption of honeycomb panels under impact of cylindrical projectile is numerically and experimentally studied. The effect of the core materials and cro...
متن کاملA Comparative Study on the Effect of Optical Illumination on Si1-xGex and Si based DDR IMPATT Diodes at W-Band
The effect of optical illumination on DC and dynamic performance of Si1-xGex based double drift region (DDR) (p+pnn+) IMPATT diode operating at W-Band is investigated and compared with its Silicon counterpart. Top Mounted (TM) and Flip Chip (FC) structures are chosen and the composition of photocurrent is altered by shining light on the p+ side and n+ side of the device through optical windows....
متن کامل