Abstract

Thin-film organic solar cell (OSC) performances have been investigated in detail by improved analytical computation in this work. The generation of excitons inside OSC has been estimated by using the optical transfer matrix method (OTMM) to include the optical phenomena of the incident light. The dissociation of these excitons into free charge carriers has been investigated to find the most appropriate one. OSC performances have been evaluated by an improved analytical solution of electrical transport equations including (i) exciton generation obtained from OTMM, (ii) dissociation probability incorporating Gaussian distribution to account for the natural fact of the difference in photon-energy producing excitons, (iii) recombination of charge carriers, all together. OSC properties such as JSC, VOC, FF, PCE, Pmax, absorbance, and quantum efficiency have been investigated with the variation of different parameters; this might be useful to improve OSC. Again, the presented detailed derivations of analytical expressions would be helpful for clear understanding.

Highlights

  • An organic solar cell (OSC) looks like a good candidate for harvesting solar energy because it has some advantageous features compared to its counterpart conventional Si solar cells [1,2,3]

  • OSCs are basically made of layers of different materials; one layer is photoactive which consists of two organic materials such that one organic material has the property to donate electrons and another organic material has the property to accept electrons, i.e., donor and acceptor

  • bulk hetero-junction (BHJ) OSC is more efficient than bi-layered OSC; many people [4,5,6] are working with BHJ OSC for its improvement

Read more

Summary

Introduction

An organic solar cell (OSC) looks like a good candidate for harvesting solar energy because it has some advantageous features compared to its counterpart conventional Si solar cells [1,2,3]. Some other works [18,19] used OTMM based generation rate but neglected recombination Another factor is the dissociation rate function used for calculating dissociation probability for computing charge carriers from the excitons. For any device, the electron-hole-separation distances will be different for different excitons because of the difference in photon-energy producing excitons To address this fact, a standard distribution function may be applied along with Braun or Wojcik model. Target 1: Improved analytical calculations of OSC performances including the following three factors all together: (i) exciton generation rate obtained 3from. OTMM to include optical phenomena, (ii) dissociation probability obtained by incorporating Gaussian distribution to consider the natural fact of the difference in electron-holeseparation distances, (iii) recombination of deficits chargeincarriers. To fill the aforementioned literature, this work: has been doneof with the following targets

1: Improved analytical calculations of OSC performances including
Matrix Method
Charge Carriers
Device Structure
OSC Performances
Results and Discussions
11. Charge result carrier per
Conclusions
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call