Enhanced broadband absorption is silicon micro structures by laser processing for solar cells

... cells on a large scale This thesis focuses on broadband enhancement of light absorption for solar cells by silicon surface texturing using laser micro/ nano -processing Laser technology has become ... fabrication of silicon micro/ nano -structures arrays by laser processing is presented Chapter Four investigated the fabricated silicon surface structures...

Ngày tải lên: 05/10/2015, 21:23

... FABRICATION OF HIGH- ASPECT- RATIO METALLIC MICRO- STRUCTURES BY REVERSE EXPOSURE METHOD AMIR TAVAKKOLI KERMANI GHARIEHALI A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ... fabricate high- aspect- ratio metallic microstructure, three objectives are targeted They are as follows: For the fabrication of high- aspect- ratio meta...

Ngày tải lên: 06/10/2015, 20:42

... the temperature dependence of the morphology of SiNWs synthesized by laser ablation In this Letter, we present the results on this project Our results show that the morphology and diameter of ... B, the temperature dependence of the morphology and diameter of the SiNWs is similar to that by thermal evaporation, reported recently by Peng et al [14] I...

Ngày tải lên: 16/03/2014, 15:09

... the solar cell performance as compared to solar cell w/SLAR structure To investigate the performance of silicon nitride SWS before fabricating on a real silicon solar cell, we simulated the solar ... efficiency of 0.8% can be seen for silicon solar cell with silicon nitride SWS over a cell with single layer silicon nitride ARCs and only 0.3% less in e...

Ngày tải lên: 22/06/2014, 00:20

... characteristics of the fabricated SiNWs solar cell under dark and light conditions the thickness of Si base substrate more thinly For improvement of conversion efficiency of the SiNWs solar cells, the ... performance Therefore, further reduction of the reflectance will be expected from the optimization of the synthesis conditions of SiNWs For analysis of the electri...

Ngày tải lên: 16/03/2014, 15:12

... preparation of aligned ultra-long and the synthesis of diameter-controlled SiOx nanotubes array by plasmaenhanced chemical vapor deposition (PECVD) process using electrospun- suspended polymer fiber ... Figs and 2, it was clearly that well -aligned and ultra-long PVP nanofibers were obtained by electrospinning over large areas There are two basic requirements...

Ngày tải lên: 22/06/2014, 00:20

... Fabrication of high-aspect-ratio micro structures using 21 (HARM) for a variety of MEMS applications Modifications and/or improvements of the UV lithography system and processing ... Fabrication of high-aspect-ratio micro structures using 25 The SU8 mold was then removed by heating in PG Remover in 10hrs Fig illustrates the SEM image of nickel comb structure with the f...

Ngày tải lên: 05/03/2014, 14:20

... Fig 2, the super-active mutant had an SARS 3C-like protease regulation by its extra domain Fig The apparent molecular mass (m) of the wild-type and mutated SARS 3C-like protease (SARS 3CLp) The ... 3C-like protease regulation by its extra domain addition to dimerization, the extra domain might have other mechanisms for regulating the cata...

Ngày tải lên: 07/03/2014, 12:20

... increased emphasis on strategic and operational risks 15% 19% Internal audit risk assessments, regulatory requirements and enterprise risk assessments will remain the top three drivers of the audit plan, ... and drive the scope of internal audit reviews Q: Which of the following you consider to be the key elements of the internal audit risk assessment p...

Ngày tải lên: 15/03/2014, 23:20

... value of SiO2 is 3.5 nm wider than that of Si Consequently, the SiNW of around 22 nm in diameter in Fig was estimated to consist of the core silicon crystal of 19 nm covered with silicon oxide of ... Fig is a schematic drawing of the electrical measurement of the SiNW covered with the silicon oxide layer The total resistance, R, is the sum of those of SiNW and s...

Ngày tải lên: 16/03/2014, 15:05

... [10±13] and thermal evaporation [14±17] are two methods normally used for the synthesis of SiNWs The key point in these two methods is the formation of a sucient amount of silicon atoms and/ or silicon ... made of a Si core and a SiO2 sheath The one-dimensional growth of SiNWs is facilitated by the SiO2 sheath that con®nes the lateral growth of SiNWs, and the...

Ngày tải lên: 16/03/2014, 15:06

... crystalline silicon without oxygen and other impurities Conclusion Tin- catalyzed silicon nanowires (SiNWs) were synthesized at various hydrogen gas flow rates using the hydrogen radical- assisted deposition ... images of the as -synthesized SiNWs at hydrogen gas flow of (a) 130 sccm, (b) 150 sccm and (c) 180 sccm All the scale bars represent 2.5 µm (d) XRD patt...

Ngày tải lên: 16/03/2014, 15:10

... orientation of the evolving Si-NWs In this study, we investigate the morphological evolution of Si-NWs on Si substrates grown by nanoscale Au–Si island- catalyzed rapid thermal chemical vapor deposition ... morphological and dimensional evolution of the Si-NWs on Si (0 1) and (1 1) surfaces grown 157 by using Au–Si nanoisland -catalyzed RTCVD For a given growth c...

Ngày tải lên: 16/03/2014, 15:15

... in 200-nm-thick silicon on insulator thin films [8–10] Simulation of the emission spectrum of an ehp by a convolution product of the density of states of the carriers affected by the Fermi–Dirac ... MEB images of the nanowires obtained by a CVD method The nanowires are copper catalyzed (a) As-grown nanowire with its catalyst droplet Its diameter is 120 nm (b) Image o...

Ngày tải lên: 16/03/2014, 15:19

... caused by the diameter decrease of the SiNWs [21] Conclusion A large-scale crystalline SiNWs on silicon wafers and Al2 O3 templates were fabricated by the thermal evaporation of silicon monoxide ... -Al2 O3 came from the decomposition of SiO and the Al2 O3 substrate, respectively Fig TEM images of the SiNWs produced by thermal evaporation of SiO on a silicon...

Ngày tải lên: 16/03/2014, 15:21