Solar cell having a discontinuously graded doping concentration
AssigneeSamsung Electronics Co., Ltd.
InventorMyoung Gyun Suh
Life of this patent
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Abstract
A solar cell includes a base layer; an emitter layer disposed on one side of the base layer; a first electrode in electrical communication with the base layer; and a second electrode in electrical communication with the emitter layer, wherein the base layer has a higher doping concentration with increasing distance from the interface between the base layer and the emitter layer, and the base layer has a doping concentration change slope that is further decreased with increasing distance from the interface between the base layer and the emitter layer.
Claims15
A solar cell comprising:
- a base layer;
- an emitter layer disposed on one side of the base layer;
- a first electrode in electrical communication with the base layer;
- and
- a second electrode in electrical communication with the emitter layer,
- wherein the base layer has a higher doping concentration with increasing distance from an interface between the base layer and the emitter layer, and the base layer has a doping concentration change slope that is decreased with increasing distance from the interface between the base layer and the emitter layer;
- wherein the doping concentration of the base layer is discontinuously changed,
- wherein the base layer has a distinguishable plurality of doping levels, and a thickness having the constant doping concentration of each doping level which is smaller than a diffusion length of a minority carrier, and
- wherein the base layer has a distinguishable plurality of doping levels, and a doping thickness in each doping level becomes thinner with increasing distance from the interface between the base layer and the emitter layer.
The solar wherein the solar cell is a multijunction solar cell.
A method comprising:
- disposing an emitter layer on one side of a base layer;
- electrically contacting a first electrode with the base layer;
- and
- electrically contacting a second electrode with the emitter layer,
- wherein the base layer has a higher doping concentration with increasing distance from an interface between the base layer and the emitter layer, and the base layer has a doping concentration change slope that is decreased with increasing distance from the interface between the base layer and the emitter layer;
- wherein the doping concentration of the base layer is discontinuously changed,
- wherein the base layer has a distinguishable plurality of doping levels, and a thickness having the constant doping concentration of each doping level which is smaller than a diffusion length of a minority carrier, and
- wherein the base layer has a distinguishable plurality of doping levels, and a doping thickness in each doping level becomes thinner with increasing distance from the interface between the base layer and the emitter layer.
Dependencies are inferred from the claim text.