手机屏幕分辨率要达到多少，才能眼睛靠多近都看不见颗粒？# PDA - 掌中宝
d*y
1 楼
有两篇，请有兴趣且能审稿的站内信联系。
1：题目：Modeling and simulation an anti-reflective coating of ZnO and ZnS
for silicon solar cells using Silvaco software
摘要
In this paper simulated single layer anti-reflective coating on silicon
solar cell that based on the refractive index limit of silicon dioxide (SiO2
), zinc oxide (ZnO) and zinc sulphide (ZnS)
are presented. Two simulations of ZnO and ZnS coating were simulated to
compare with SiO2
anti-reflective coating on silicon solar cell surface. These simulations
carried out with variable
coating thickness that is 50 nm, 60 nm, 70 nm and 80 nm by using ATLAS
simulator. From
the simulation obtained, it was found that the value of Voc and Jsc are 397.
69 mV and 15.646
nA/µm2, respectively, from silicon solar cell with 0.05 µm SiO2
coating. For the fill factor
and power conversion efficiency of this solar cell is 0.758 and 4.72 % were
computed. As for
the ARC simulation, the spectral response of ZnO and ZnS coating was
increased around 600
and 700 nm, respectively, which are capable of reducing the reflectivity
over a wide range of
wavelengths compared to SiO2 increased around 0.4 µm wavelength. This
can be concluded that
when the refractive index value is higher, the available photocurrent can be
higher in wide range
wavelength and more reducing the reflectivity. For the ARC analysis, the
spectral response graph
was plotted to evaluate the external quantum efficiency (EQE). From the
results obtained the
maximum percentage of EQE, which nearly 0.9999 % is on 60 – 80 nm thickness
ZnO coating.
Meanwhile the EQE of ZnS is increasing around 600 – 800 nm of broad range
wavelength. And
this mean the ZnS coating could perform more efficiency on wide range of
wavelength compared
to SiO2 and ZnO ARC.
2. 题目： Power Quality Improvement by Intelligent Harmonic Regenerative
Filters for Nonlinear Load Power Systems
摘要
The area of Power Quality Issues and Remedial Measures has received
considerable attention from the Power Utilities, Power Consumers and Power
Equipment Manufacturers over the last decade. Large-scale use of bulk power
Thyristor Converters and Industrial Electronic Equipment resulted in
waveform pollution at all levels in the Power Systems from mid-eighties
onwards.
The issue became more serious with the proliferation of non-linear loads (
rectifiers, arc furnaces, variable speed drives, UPS, computer load,
printers, domestic electronic equipment etc.) in the Industrial, Commercial
and Residential sectors in the past decade. These loads, as a rule, draw
nonsinusoidal currents from the supply and lead to voltage distortion and
related system problems. With the wide spread use of Power Electronics at
all levels, the polluting loads became spread out system wide and Power
Quality Improvement Measures concentrated at a few bulk power points turned
out to be insufficient to mitigate system wide problems.
This paper demonstrates the power quality issues behind the uneven switching
of two types of converters and mitigation technology implemented to solve
it. For having better operation of power utilities intelligent techniques
are applied and performances are compared with the simulated results.
1：题目：Modeling and simulation an anti-reflective coating of ZnO and ZnS
for silicon solar cells using Silvaco software
摘要
In this paper simulated single layer anti-reflective coating on silicon
solar cell that based on the refractive index limit of silicon dioxide (SiO2
), zinc oxide (ZnO) and zinc sulphide (ZnS)
are presented. Two simulations of ZnO and ZnS coating were simulated to
compare with SiO2
anti-reflective coating on silicon solar cell surface. These simulations
carried out with variable
coating thickness that is 50 nm, 60 nm, 70 nm and 80 nm by using ATLAS
simulator. From
the simulation obtained, it was found that the value of Voc and Jsc are 397.
69 mV and 15.646
nA/µm2, respectively, from silicon solar cell with 0.05 µm SiO2
coating. For the fill factor
and power conversion efficiency of this solar cell is 0.758 and 4.72 % were
computed. As for
the ARC simulation, the spectral response of ZnO and ZnS coating was
increased around 600
and 700 nm, respectively, which are capable of reducing the reflectivity
over a wide range of
wavelengths compared to SiO2 increased around 0.4 µm wavelength. This
can be concluded that
when the refractive index value is higher, the available photocurrent can be
higher in wide range
wavelength and more reducing the reflectivity. For the ARC analysis, the
spectral response graph
was plotted to evaluate the external quantum efficiency (EQE). From the
results obtained the
maximum percentage of EQE, which nearly 0.9999 % is on 60 – 80 nm thickness
ZnO coating.
Meanwhile the EQE of ZnS is increasing around 600 – 800 nm of broad range
wavelength. And
this mean the ZnS coating could perform more efficiency on wide range of
wavelength compared
to SiO2 and ZnO ARC.
2. 题目： Power Quality Improvement by Intelligent Harmonic Regenerative
Filters for Nonlinear Load Power Systems
摘要
The area of Power Quality Issues and Remedial Measures has received
considerable attention from the Power Utilities, Power Consumers and Power
Equipment Manufacturers over the last decade. Large-scale use of bulk power
Thyristor Converters and Industrial Electronic Equipment resulted in
waveform pollution at all levels in the Power Systems from mid-eighties
onwards.
The issue became more serious with the proliferation of non-linear loads (
rectifiers, arc furnaces, variable speed drives, UPS, computer load,
printers, domestic electronic equipment etc.) in the Industrial, Commercial
and Residential sectors in the past decade. These loads, as a rule, draw
nonsinusoidal currents from the supply and lead to voltage distortion and
related system problems. With the wide spread use of Power Electronics at
all levels, the polluting loads became spread out system wide and Power
Quality Improvement Measures concentrated at a few bulk power points turned
out to be insufficient to mitigate system wide problems.
This paper demonstrates the power quality issues behind the uneven switching
of two types of converters and mitigation technology implemented to solve
it. For having better operation of power utilities intelligent techniques
are applied and performances are compared with the simulated results.
