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Questions tagged [solar-cells]

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2answers
58 views

Would this work as a way to get more energy from sunlight? [closed]

Plants only absorb certain wavelengths of light. This leaves a lot of light useless. But... imagine putting plants on a wheel and spin that wheel very fast. Then the light is red-shifted and so the ...
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1answer
23 views

Solar cell short circuit current

In order to obtain a solution to the short circuit current in a solar cell a boundary condition n=p=0 at the junction is imposed. Why only for short circuit current?
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1answer
41 views

Calculating output of a solar cell

If we are given a particular solar panel with some semiconductor tabs in it, How can I calculate the output of the Solar panel per metre square With the values of ( average hours of sun everyday, ...
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0answers
22 views

Solar cell: Surprising change in EL for varying PEDOT:PSS-thicknesses

I am currently working on improving a solar cell, which is partly transparent and therefore utilizes two transparent electrodes (TCO on top and PEDOT:PSS on the bottom). As PEDOT:PSS alone is not ...
6
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1answer
114 views

What kind of engine is a photovoltaic solar cell?

I have read several times here (on PSE) and there (in Google) that photovoltaic solar cells aren't heat engines. I.e. they are not working via a heat transfer between 2 reservoirs, and so they are not ...
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1answer
22 views

How can one determine the key characteristics of a solar cell from the I-V curve?

I have recently measured the IV characteristics of several Si solar cell samples and am now attempting to extract the series resistance $R_S$; parallel resistance $R_P$; open circuit voltage $V_{OC}$; ...
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4answers
8k views

Why are solar panels kept tilted?

I have noticed that, in my country India, most of the solar panels are tilted southward at an angle of ${45}^{\circ} .$ Even on buildings with inverted V-shaped roofs, solar panels are still oriented ...
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1answer
20 views

Does quantum efficiency of solar cells vary with irradiance?

I want to know if a solar cell exposed to high irradiance (perhaps artificial light) of say 1500 w/m2 would suffer reduced QE. For the sake of the question lets assume the solar cell is in an ...
-1
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1answer
64 views

what limitations stop a person from installing solar panels on his/her house? [closed]

Solar energy is a great form of energy. sourced from the sun, it can save a great deal of electricity bill cost. My question is why doesn't everyone uses it and install panels on their roof. Of ...
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1answer
24 views

Does doped semiconductor have free electrons at 0K?

For intrinsic semiconductors, they don't have any free electrons at conduction band at 0k and behave like insulators. But if doped, let's say n-type doped, they will have extra electrons which do not ...
4
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0answers
77 views

We just need a solar panelled SPAIN to power the world? [closed]

A stiffer, more formal (form, schmform!) way to ask this is: Is a solar panel field the size of Spain enough to cover the worlds energy needs? (This assumes that everything in the world runs on ...
-1
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2answers
55 views

Will the electron-hole pairs in a solar cell ever run out?

I have read from various sources that, the photon strikes the solar cell and creates and electron hole pair which then migrates to their respective ends of the cells, this creates a potential ...
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1answer
30 views

Depletion layer of solar cell? [closed]

What happens to depletion layer of solar cells when light is falling on it? Please reply as soon as possible. Thank you
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2answers
70 views

Sonomotors, Sion: Can this electric car really charge up to 30km only from its solar cells? [closed]

Maybe you have heard about Sonomotors and its futuristic electric car, the Sion. If not, here is the link to its website: https://sonomotors.com/ Anyway, the manufacturer claims that this car can ...
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0answers
26 views

Why does coating increase the amount of energy solar panels can generate?

As far as I know: Solar panels consist of at least two layers, that reflect and absorb light to some degree. The first layer is a semi-conductive material and the main contributor of the energy that ...
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0answers
23 views

Question about built in voltage in p-n junction

If I have two materials, joined together to make a p-n junction, the $V_{bi}$ is found by calculating the difference between the conduction bands or LUMO levels. Should this be the same as the ...
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0answers
42 views

Further doping p-type material. Why doesn't this increase the hole mobility. etc?

I did a project in which I made perovksite nanocrystal solar cells. The hole transport material was doped with another p-type material and performance was compared. It turns out that this didn't ...
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1answer
56 views

Solar panels efficiency [closed]

The efficiently of solar panels is quite low: about 30%. Could nanotechnology make improvements in solar panel technology?
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0answers
28 views

Why are the electrodes in thermodynamic equilibrium for a working solar cell?

I was reading a paper that performed simulation of a solar cell under illuminated conditions. Obviously, in these conditions, the device is out of thermodynamic equilibrium. For example the ...
28
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7answers
5k views

Why is silicon used for making solar cells?

Silicon has a bandgap of 1.1 eV, whereas germanium has 0.65 eV. Silicon has an indirect bandgap, whereas gallium arsenide has a direct bandgap. Still silicon is mainly used for making solar cells. Why?...
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1answer
56 views

Why are solar cells affected by temperature?

I know that solar cells efficiency increase with lower temperatures, but why? I found only equations on efficiency using temperature coefficient, but I want to know the physics behind it. Thank for ...
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1answer
58 views

Do solar panels generate more electricity at higher altitudes?

The atmosphere is thinner at higher altitudes, so do solar panels get more energy from the sun? Does the cold help or hinder their performance? Is a solar panel in space with no atmosphere is the ...
62
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11answers
20k views

Why don't solar panels contribute to global warming?

I've been wondering this for a while but I have not yet encountered an explanation. This is from my understanding of physics, which is by no means expert, so sorry for my crude explanation: Energy ...
1
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1answer
21 views

UV Preconditioning test [closed]

I wanna build a solar panel with a new material and I wanna to test the endurance of the material against UV light. I've found in internet a Standard for UV tests. It says it has to be irradiated with ...
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2answers
125 views

In photoelectric effect, what is effect of frequency? [closed]

So what does the frequency of the light in photoelectric effect does ? Does it increases number of electrons?
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1answer
82 views

If energy is supposed to be a scalar, why does this logic of solar panels work?

In case of a solar panel, the light perpendicular to the surface gets absorbed while the parallel component doesn't. But wouldn't the scalar sum of magnitudes of parallel and perpendicular components ...
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3answers
66 views

Is it possible to power a car with chemiluminescence? [closed]

Chemiluminescence means substances that in a reaction emit light. I wonder if such a reaction would be possible to power an electric car using an photovoltaic panel lighted by the chemical reaction?
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0answers
26 views

Photovoltaic ‘Rectenna’ is it possible?

Video: https://youtu.be/BKyksxC_nxY A copper wire with N and P type Silicon on it wrapped around a fiber optic thread or glass rod with light entering on end and bouncing around inside and exiting ...
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1answer
48 views

Is there a way to manipulate/interfere sun light? [closed]

What happens when yellow light is passed through a prism? If the speed of a light wave decreases, doesn't the frequency decrease as well? is there a way to manipulate/interfere sun light or a ...
0
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0answers
23 views

Current jumps up at low resistances - Solar Cell experiment

So I did an experiment with solar cells to obtain an I-V curve where the output current was routed through a variable resistor. near where the short circuit current part should be (at low values of ...
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2answers
64 views

A way to increase photovoltaic cell efficiency with fiber optics?

A way to increase photovoltaic efficiency using fiber optics? One of the claimed inhibitors of efficiency was the band gap of materials which contrasts to that of a photon. My idea is a way to ...
0
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1answer
51 views

Thermal stability of solar cells

Concerning the construction of solar cells which property is referred to when researchers speak about thermal stability of solar cells?
0
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1answer
376 views

Why can't I measure my solar panels short circuit current?

I connected the multimeters COM port to the negative lead on my solar panel, the 200mA port to the positive lead on the panel. I then pointed a lamp at the solar panel the voltage was around 7V, but ...
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0answers
272 views

Inverse Square Law's effect on solar panels

Hey I'm doing an experiment for school and I'm trying to investigate how the distance of a light source affects the output of a solar panel and I've faced a few problems since i'm trying to include ...
1
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1answer
143 views

Thermodynamic potential of a solar cell

It is a known result that the photo-voltage generated in photovoltaic system (such as a simple p-n junction) is directly related to the quasi Fermi levels splitting at the contact - as illustrated by ...
1
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2answers
56 views

Could focused sunlight ignite a pellet of lithium deuteride?

This is a basic question, but it something I have been wondering ever since I learned about inertially confined fusion. In the ICF reactor configurations I am aware of, the drivers that are used to ...
1
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0answers
36 views

Is it possible to model a solar thermal concentrator using Zernike polynomials?

This question might seem a bit off-topic, but I guess there are a lot of people here that know about optics, telescopes, etc. I would like to simulate solar thermal systems that focus solar ...
2
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1answer
53 views

What happen to organic solar cell when applied electric field? [closed]

For example, I have a PTB7:PCBM organic solar cell. I applied electric field in forward basis. Will it contribute to increase charge separation? Then, if I do in reverse basis, what will happen to ...
2
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2answers
87 views

Doubt about the working principle of a silicon solar cell

I'm studying crystalline solar cell and their working principle, but I still don't completely understand the process. First of all, I understand that we dope a pure crystalline silicon with boron and ...
0
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1answer
78 views

On what planet within the Asteroid Belt would solar panels work the best?

I was researching for a project and came across this question. Maybe this is a bit too broad? How might solar energy work on Mars? Would it be sufficient to sustain a colony?
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1answer
1k views

Perovskite solar cells: Why are electron/hole-transporting layers required?

I am looking at device architecture of planar heterojunction solar cell. What I understand from reading "Planar heterojunction organometal halide perovskite solar cells: roles of interfacial layers" (...
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2answers
80 views

Can an electric car be usefully powered (or at least supported) by solar energy?

There are cars on the road that run on electricity instead of gasoline. And that's great, it really is. But you have to charge them, which is a problem if there are no charging stations in your area....
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1answer
137 views

Would putting a magnifying glass on a solar panel be beneficial? [duplicate]

During my childhood, it was common to use magnifying glasses to burn paper and dead leaves. But would it be a good idea to place a lens above a solar panel, making sure that all the magnified light ...
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0answers
24 views

Why Mobility Of Thin Film Changes With Deposition Temperature

A metal oxide thin film is a p-type semiconductor (say copper oxide Cu2O) due to metal vacancies in the film. This thin film can be deposited using some form of vacuum/vapor deposition. I know that ...
3
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0answers
59 views

Light - Indium Tin Oxide Interaction

I need to understand the mechanisms behind the light - indium thin oxide interaction for an ITO deposited solar cell. Does it act like a metal or semiconductor? Does it generate electron-hole pairs ...
2
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1answer
845 views

Can solar panels cool the atmosphere? [duplicate]

I am just curious if solar panels, because they absorb radiation, cool the atmosphere. If there were enough of them, would the temperature be different? I'm not a physicist or student.
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1answer
39 views

Orbital sunshade over the poles

Blocking sunlight to an area 5-7 million sq miles, in a shape of a pie, with the center 100,000 sq miles left out. We have the technology to make a fabric of nano-tubes for strength, reflective or ...
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1answer
568 views

Gamma ray energy efficiency

How could we collect energy from gamma/x-rays instead of visible light which can be millions of times less efficient (compared to gamma/x-radiation)? Since ...
0
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1answer
398 views

Open circuit voltage and band gap

I try to estimate the open-circuit voltage of an ideal solar cell (no non-radiative loss) with perfect absorption, illuminated by a black body at temperature $T_{\odot}$ and at full concentration. I ...
0
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1answer
521 views

What is the difference between silicon wafers in electronics and silicon wafers in solar cells? [closed]

What is the difference between silicon wafers in electronics and silicon wafers in solar cells? are the the same? and if different why are they different?