Questions tagged [solar-cells]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
21 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 $V_{OC}$; ...
-2
votes
0answers
23 views

How Can I connect My Solar System? [closed]

I brought this 50A Solar Controller now I want to connect an inverter to it and they said to connect the inverter directly to the battery. What is these "60A/50A/40A/30A/20A/10A "? I choose the 50A ...
34
votes
4answers
8k views

Why are solar panels kept tilted?

I have noticed that, in my country India, all 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 ...
1
vote
1answer
18 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
votes
1answer
60 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 ...
1
vote
1answer
21 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
votes
0answers
74 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
votes
2answers
53 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 ...
-1
votes
1answer
27 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
0
votes
2answers
69 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 ...
0
votes
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 ...
0
votes
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 ...
1
vote
0answers
40 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 ...
-1
votes
1answer
53 views

Solar panels efficiency [closed]

The efficiently of solar panels is quite low: about 30%. Could nanotechnology make improvements in solar panel technology?
0
votes
0answers
27 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
votes
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?...
2
votes
1answer
53 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 ...
0
votes
1answer
48 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 ...
61
votes
11answers
19k 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
vote
1answer
17 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 ...
0
votes
2answers
119 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?
-1
votes
1answer
75 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 ...
-2
votes
3answers
63 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?
0
votes
0answers
25 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 ...
-1
votes
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
votes
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 ...
1
vote
2answers
63 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
votes
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
votes
1answer
316 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 ...
1
vote
0answers
228 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
vote
1answer
126 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
vote
2answers
53 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
vote
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
votes
1answer
50 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
votes
2answers
84 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
votes
1answer
76 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?
0
votes
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" (...
0
votes
2answers
78 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....
4
votes
1answer
108 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 ...
1
vote
0answers
23 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
votes
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
votes
1answer
706 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.
0
votes
1answer
36 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 ...
-4
votes
1answer
491 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
votes
1answer
379 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
votes
1answer
500 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?
2
votes
0answers
44 views

Do Solar Cells Regenerate After Exposure to Ionising Radiation?

In the past, plenty of research has been done on the effects of ionising radiation on solar cells. This is due to the importance of high efficiency solar cells for electric spacecraft propulsion. Such ...
2
votes
0answers
50 views

Why are spin coated polymer solar cells more efficient?

Reading papers on polymer solar cells (PSC from now on), it is seen that many different coating techniques are used in order to coat polymer films on substrates. It is also seen that spin coated ...
3
votes
2answers
193 views

Why don't solar panels eventually reach electrical charge equilibrium?

Here is my understanding: Solar panels work based on electrons from an N-type semiconductor losing electrons that travel from a metal grid, through whatever you're powering, to the back grid where ...
0
votes
1answer
109 views

Losses occurring in solar cells [closed]

If a solar cell is subjected to a light of intensity $1000$ $\text{W/m^2}$, the output at the cell is much less than ideal case scenario. What are all the factors causing energy losses in a solar cell?...