Rear side passivation solar cell

• Main Authors: FANG JIEBIN, CHEN GANG, SHI QIANG, HUANG YUPING, HE DA'NENG, QIN CHONGDE
• Format: Patent
• Language: English
• Published: 21.01.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SEMICONDUCTOR DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model discloses a rear side passivation solar cell, comprising rear electrodes, a rear electric field, rear side passivation layers, a P type silicon, an N type emitter electrode, a passivation coating and positive electrodes which are successively in connection, wherein the rear side passivation layers comprise Al2O3 layers and silicon nitride (Si3N4) layers; the Al2O3 layers are in connection with the P type silicon; the silicon nitride layers are in connection with the Al2O3 layers. According to the utility model, atomic state hydrogen saturation matrix surface suspension keys are increased to provide a lot of fixed charge field passivation effect, open-circuit voltage (Voc) + 10 mV(absolute value) is increased, conversion efficiency is improved, and requirements for silicon wafers of different thickness are satisfied.