Study of GaP/Si Heterojunction Solar Cells

A Comprehensive Study Of Some Heterojunction Solar Cells

There are three different models which have been developed to describe the current-voltage characteristics of a heterojunction solar cell with different mechanisms assumed for the dark current in each model while the short circuit current is assumed to be due to the diffusion of the minority carriers. The first model was developed by R.L. Anderson in which he assumed that the dark current is du...

Heterojunction silicon microwire solar cells.

We report radial heterojunction solar cells of amorphous silicon on crystalline silicon microwires with high surface passivation. While the shortened collection path is exploited to increase the photocurrent, proper choice of the wire radius and the highly passivated surface prevent drastic decrease in the voltage due to high surface-to-volume ratio. The heterojunction is formed by depositing a...

Hydrogen bonding in bulk heterojunction solar cells: A case study

Small molecules with dithieno[3,2-b;2',3'-d]thiophene as central building block and octyl cyanoacetate and octyl cyanoacetamide as different terminal building blocks have been designed and synthesized. The amide containing small molecule can form intermolecular hydrogen bonding between N-H...O = C of the amide group. The photovoltaic properties and active layer morphologies of the two molecules...

Stability of graphene-based heterojunction solar cells

Bulk-heterojunction (BHJ) solar cells based on organic small molecules and polymers are the focus of increasing attention by science and commerce. In organic photovoltaic devices, a conjugated polymer layer is used as the donor, while a fullerene-based derivative is used as the acceptor. Poly(3,4ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is one of the most common interfacial ma...

Bulk Heterojunction Solar Cells — Opportunities and Challenges