Multijunction solar cell and preparation method thereof

• Main Authors: SONG MINGHUI, WANG DUXIANG, CHEN WENJUN, LIU GUANZHOU, LIN GUIJIANG, LI MINGYANG, XIONG WEIPING
• Format: Patent
• Language: English
• Published: 28.01.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; 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 invention provides a multijunction solar cell and a preparation method thereof. The multijunction solar cell structurally comprises a first epitaxy structure and a second epitaxy structure placed on the first epitaxy structure, wherein the first epitaxy structure sequentially comprises a substrate, a first photovoltaic conversion lamination layer and a covering layer from bottom to top, and the second epitaxy structure sequentially comprises a back contact layer and a second photovoltaic conversion lamination layer from bottom to top. A first electrode layer and a second electrode layer are arranged on the surface of the covering layer of the first epitaxy structure and the surface of the back contact layer of the second epitaxy structure respectively, and the vertical projection of the second electrode layer is placed in the first electrode layer. The covering layer of the first epitaxy structure and the back contact layer of the second epitaxy structure are connected through a gluing layer. The first electrode layer and the second electrode layer are connected, so that the first epitaxy structure and the second epitaxy structure are connected with each other, and therefore the multijunction solar cell is formed.