Questions tagged [photovoltaics]

The tag has no usage guidance.

-1
votes
0answers
16 views

What are the most significant research papers in the study of photovoltaics?

I am trying to find the most significant recent-ish research papers that have helped with and focused solely on the progression of solid-state photovoltaic cells. I am also trying to find recent ...
1
vote
1answer
15 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
vote
0answers
32 views

Light Intensity vs Power for a Small Incandescent Lamp

Today I did a quick experiment where I measured the light intensity of a small incandescent bulb for a range of voltages (0 to 31V). I also measured the current. I expected to see the light ...
1
vote
1answer
50 views

Where do photons excite electrons in the PN junction?

Assuming a Si-Boron P-type, and Si-Phosphorous N-type solar cell. N-type is on top and P-type is bottom. I understand that after both semiconductors are layered a depletion zone is formed. Where e- ...
-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
1
vote
0answers
63 views

Attempting to calculate the mobility from SCLC measurement (space charge limited current)

I performed an SCLC measurement on a p-type material (hole transport layer) for a solar cell. Referring to the wikipedia page:https://en.wikipedia.org/wiki/Space_charge The relationship between $J$ ...
1
vote
0answers
39 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 ...
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 ...
1
vote
1answer
109 views

What does it mean if the resistance of a semiconductor increases due to light?

I have synthesized an $n$-type semiconductor material $\text{ZnO}$. Under light illumination, its resistance keeps increasing. What are the reasons for this?
-2
votes
1answer
61 views

An Experiment : A Infrared photovoltaic Cell In A Cooler Box

I like to propose an experiment here. A Japanese research institute has developed a photovoltaic cell that can generate electricity in a total dark environment. This photovoltaic cell can generate ...
-2
votes
3answers
60 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?
-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
1answer
47 views

Is IR radiative cooling of solar cells a valid efficiency improvement?

I am interested in photonics and I stumbled across the following article: https://pubs.acs.org/doi/pdf/10.1021/nl4004283 But is IR radiative cooling really viable? If there's some water in the air, ...
0
votes
1answer
35 views

Can be a 'frequency funnel material' created?

Hello everybody and thank you for answering. I have an idea in my mind since a while to raise the efficiency of solar panels, but It needs of a material with a very specific property. The material ...
0
votes
1answer
26 views

Solar photovoltaic diode current flow

When the PV cell is provided an external circuit, why do the electrons flow through the wire even when it can flow directly from within, between the p and n side? What happens to the generated ...
1
vote
3answers
2k views

What is the difference between photoconductive and photovoltaic detectors?

What is the main difference between photoconductive (PC) and photovoltaic (PV) detectors? I notice that PC detectors are typically AC coupled (requiring modulation of the light source to generate a ...
2
votes
1answer
49 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
95 views

Extreme life - energy source for living tens of kilometers underground? [closed]

Living cells were found up to at least 12 miles underground (article), and in other extreme places (BBC survey article), for which beside the problem of just surviving in such extreme conditions, a ...
2
votes
2answers
82 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 ...
1
vote
0answers
332 views

How is a Potential Difference Created in Photo Voltaic Cells?

In order for photo cells to produce current, N and P type material are joined to create a depletion zone. I understand how incoming photons can dislodge electrons from their atoms in the N type ...
1
vote
1answer
623 views

Photovoltaic cell - why is I-V curve so strange

Today I was doing practicals with PV cells and my team was measuring IV curve of a solar cell. The cell was not homogenously illuminated and the illumination was very strong. Our measurements were ...
0
votes
1answer
167 views

Quantum Numbers and Light [closed]

I know how the quantum numbers can be applied to atomic and molecular orbitals, and that they have very similar nuclear interpretations, but how are these quantum numbers applied to light? I believe ...
4
votes
1answer
108 views

If the energy of photons at the bottom of the visible spectrum (~720 nm) is 1.72 eV, why does a red LED light up at only 1.48 V?

I have a red LED (623 nm peak wavelength) which I am able to light up at 1.48 V. I thought the switch-on voltage should be determined by $hc/(e\lambda)$, but that would give 1.99 V for 623 nm. Even ...
1
vote
1answer
79 views

Photon interactions with photovoltaic cells

I was wondering how different energy photons interact with the electrons in a semiconductor in a PV cell. If the photon has less energy than the band gap, then the photon passes through and does not ...
7
votes
1answer
144 views

Why is my solar panel more efficient as the temperature increases, rather than less efficient?

I have recently performed an experiment in which I placed a solar panel inside a closed box, together with a heater and a lamp (60W). I increased the temperature using a heater from 20ºC to 50ºC. The ...
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 ...
-1
votes
1answer
158 views

How solar panels produce energy

In solar panels, is heat energy converted into electrical energy or is light energy converted into electrical energy?
2
votes
0answers
73 views

Increasing potential beyond saturation current in photoelectric effect

After reading several posts and sources online, I think I finally understand the saturation current: at the saturation current, all of the electrons being emitted due to the incident light are being ...
0
votes
1answer
2k views

Solar panel frequency range

What is a solar panel's frequency range (i.e. from THz to THz)? Is there a way to capture energy that exceeds that frequency range, either more towards IR or UV? If so, you could produce energy from ...
0
votes
2answers
137 views

Questions about the Photovoltaic Effect

So this is my second query about the photovoltaic effect. I've looked into it more and understood it for the most part, but there's still something I don't completely get. After the electrons are ...
1
vote
1answer
60 views

Is the Photovoltaic Effect observed only in P-N junctions?

So far, all the sources I've found explain the photovoltaic effect in relation to p-n junctions when talking about solar cells (since that's what they're made out of), but I was wondering if one could ...
0
votes
1answer
55 views

How much solar power is there in electromagnetic energy types not collected by conventional solar panels?

The solar panels that can be bought today typically respond to a relatively small portion of the emission spectrum of the sun. Not so coincidentally, solar panels are rather inefficient, with typical ...
2
votes
1answer
40 views

Are large scale optical power delivery systems feasible?

I am attending an introductory course of optics and photonics and we just started to study optical fibers for digital communications. However, I have started wondering about using optical fibers to ...
0
votes
1answer
157 views

This spinning solar cell advertises a 20x efficiency improvement. How?

Video: These Spinning Solar Cells Generate 20 Times More Power Than Traditional Panels. I am sceptical because commercial panels have an efficiency of 15-20% and research panels are even better: How ...
1
vote
0answers
43 views

Can a single photovoltaic semiconductor junction ever produce a voltage much above it's own band gap?

A simple model for a photovoltaic cell is a current source with a series resistor, and a few more items. The current from the current source is some fairly constant proportionality constant of the ...
0
votes
1answer
61 views

Do III-V based photovoltaics “glow” (photo-luminesce) when illuminated but not loaded?

In this nice answer I started to learn about how the silicon photovoltaics cells on the International Space Station are managed. In that case, the cells are generally either delivering useful power to ...
0
votes
1answer
38 views

Feasibility of silicon heterojunction solar cells in utility scale

I came across with the article on a russian website, saying they are planning to start production of solar cells using advanced semiconductor technology called "quantum heterostructure" (maybe in ...
0
votes
2answers
148 views

which is efficient on solar electricity by photo voltaic or thermal

As we know solar energy used to generate electricity in two major ways: photovoltaic and thermal energy. The most small applications or personal use are mostly using solar cells. But when it comes to ...
1
vote
8answers
493 views

Why not use our own light production to produce new energy instead of wasting it?

Why don't we use our own light production at night (I mean home, buildings, streets,..., lighting) to charge photovoltaic panels instead of wasting it?
0
votes
1answer
63 views

What parameters decide the maximum concentration achieved by a fresnel lens?

Fresnel lens can be used for concentrating sunlight for Photovoltaic. What parameters of the lens decide the maximum concentration that can be achieved using the lens.
1
vote
3answers
399 views

In a photovoltaic effect, when the electron absorbes the photon, is the electron's energy displaced?

I'm a super amateur wannabe physicist, and I'm trying to learn the fundamental workings of the photovoltaic effect. I haven't been able to understand "how" or "what" is displaced/transmitted in the ...
0
votes
1answer
78 views

p-n diode, Power as a function of the logarithm of the circuit resistance

in a circuit comprised of p-n diode and with characteristic Ohmic resistance making the diode's resistance negligible , we have for the current passing through the diode $I=I_s(exp(Ve/kT)-1)$ where ...
1
vote
1answer
863 views

Depletion region thickness in solar cells

It is well known that typical Si solar cells are rather thick (hundreds of micrometers). Now, Si has an indirect band-gap and therefore weak optical absorption at low energies (needing a phonon-...
1
vote
1answer
618 views

How can the active area of a photodiode increased?

I use photo-diode VTB8440BH. To increase its active area I was thinking to put a lens in front the diode would enlarge its active area. What kind of lens would be beneficial one? I was thinking of a ...
0
votes
1answer
92 views

What is a n-type doped solar cell?

I always thought a solar cell consists of two areas, a n-type and a p-type doped one. So what exactly is meant by n-type doped solar cells? Does it not have a p-type doped area? And how does it work ...
0
votes
1answer
371 views

How to calculate the potential of a photocell?

My guess is that because the wire is connected to a single point on the plate, we can treat it as a point charge and use the formula: $$V = k\frac{k(\pm q)}{|r|}$$ But I think there are different ...
1
vote
1answer
4k views

Bimolecular recombination in few words

I'm making a short seminar about VERY broad topic of fullerenes in photovoltaics, but I'd like it to be educational (not just full of words hard to audience to make them think I'm smart). In one of ...
0
votes
1answer
52 views

Why is Al2O3 so popular in plasmonics?

I've tried to find my own solution for this question and found out that It is cheap It is an insulator It efficiently absorbs UV Are there more properties that makes it so popular?
0
votes
1answer
648 views

Would it be efficient to run a solar panel with laser?

Would it be efficient to run a solar panel with laser? I know this question is unsual as we are using electricity powered laser to run a solar panel. Actually i am paricipating in the Google Science ...
0
votes
1answer
105 views

Can a solar panel work with heat?

As we know that a solar panels due to the energy of light, but can we run a solar panel with the same amount of energy provided as heat?