多结太阳能电池外延结构

• Format: Patent
• Language: Chinese
• Published: 16.01.2018
• 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

公开种多结太阳能电池外延结构，包括第子电池、第二子电池和第三子电池，在第二子电池和第三子电池之间设置有反射渐变层；反射渐变层包括多组分布式布拉格反射层，在每组分布式布拉格反射层内部，材料的晶格常数不变；从第二子电池到第三子电池，各组分布式布拉格反射层的晶格常数逐渐变化，使得最靠近第二子电池的组分布式布拉格反射层的晶格常数接近第二子电池的晶格常数，最靠近第三子电池的组分布式布拉格反射层的晶格常数接近第三子电池的晶格常数；整个反射渐变层材料的禁带宽度都不小于第二子电池基区的禁带宽度。根据本发明的多结太阳能电池外延结构，在提高电池的光电转换效率的同时，能够减小电池的厚度，降低电池制造成本。 The invention discloses a multi-junction solar cell epitaxial structure which comprises a first sub battery, a second sub battery and a third sub battery, wherein a reflection gradually-changing layer is arranged between the second sub battery and the third sub battery and comprises multiple groups of distributed Bragg reflection layers; in each group of the distributed Bragg reflection layers, the lattice constant of the material is not changed; from the second sub battery to the third sub battery, the lattice constants of each group of the distributed Bragg reflection layers are gradually changed, so that the lattice constant of the group of the distributed Bragg reflection layers nearest to the second sub battery is