Solar cell Definition and 116 Threads

Hi, Has anyone tried getting the voltage distribution of a biased solar cell with the poisson equation ( (d"V/dx") = (q/e)*(p-n) ) and electron and hole densities equation ( n = Nc*exp(-(Ec-qV-F)/kT) , p = Nv*(exp(Ev-qV-F)/kT) ) where Nc and Nv are the effective density of states, Ec and...

In order to build a QE measurement system, I want to confirm the following issues: (1) Is collimated light required for QE characterization of the entire solar cell? How "bad" it could be if having Gaussian beam? (2) It seems LBIC is most common for QE mapping. Is it possible to use...

I'm working on a project for class. The project requires a certain level of difficulty. The idea: A system that would theoretically monitor the current through EACH solar cell in a Photovoltaic panel to ensure it wasn't shaded or defective.(For those that don't know, when a solar panel is...

Hey people, I wanted to try this experiment. My experiment is to shine a light on a solar cell and try to figure out the frequency of the light. I do have some idea on how to do this using energy concepts. E_i+W_n_c=E_f E_i= initial energy in the system (joules) W_n_c= work that...

I have to do a coursework on this topic. Do you maybe know any useful websites i can use? Well, for my coursework i am going to investigate how the voltage and current from a solar cell varies with distance from a light source- Is it right to say the more far away the cell is from the light...

HI. I got some question about the derivation of the I-V characteristic in a solar cell. The first step is to solve the minority carrier diffusion equation with appropriate boundary conditions: at the edges of the cell and at the edges of the depletion zone. At the edges of the d.z. the...

http://tinyurl.com/6fptha The new solar cell in the link appears to violate the Second Law of Thermodynamics. It extracts energy and cools in a uniform temperature environment according to how I understand the article. Can someone explain why it doesn't? (I have no idea.)

Is 55°C best status for solar cells?

Homework Statement I am asked to plan a practical to determine the power output of a solar cell, i.e how much light energy is converted toe electrical energy per second. Now I thought(obviously) to just connect voltmeter across it with an ammeter and use PVI, however thinking about it, I don't...

Homework Statement Basically, my task is to find out the internal resistance of a solar cell. I set-up a circuit as seen here (http : / / mt14 . quickshareit . com / share / picture666d18 . png), and measured the Current and Voltage on different settings of resistance in 5Ohm intervals from...

Dear all, i am possible to do experiment on the application of solar cell and i have run into several problems so i need to seek advice from all the experts in here. I have several DC loads include: 1 x Cooler fan (12V, 0.25A) 1 x cooler fan (12V, 0.2A) 2 x rechargable AA size battery...

Hello! I'm very interested in solar cell tehnology. I know that the main material used is crystalline silicon. Is it possible to buy all the materials that are necessary and to make the solar cell at home conditions? I hope that this process is not very complicated and laboratory isn't needed...

Hey, I recently read that they made a 40% efficient solar cell... what does this actually mean? How do they calculate this efficiency... and how much power do these cells actually produce? and what's with the mono and poly crystalline titles that they get? what does that mean?? Any info...

I have this homework question I can't quite figure out. Any help is greatly appreciated. In direct sunlight, solar cells have a power density of approximately 15 mW/cm2. Suppose a sensor node consumes on average 10mW of power. How large of a solar cell array is needed to meet this...

Hi, I am trying to do coursework on measuring the internal resistance of a solar cell. The light intensity on the solar cell is not going to change so the only thing that can be changed is the resistance as a variable resistor is used.But I am not sure how to find the internal resistance when I...

Hey all, New guy on the site. Just to start off, I'm 15 year old who enjoys reading (mainly physics). Now, as many may already know, current crystaline silicon has been proven to have a total efficiency of 25%. Some companies have even quit on their thin film solar cell technology due...