Microstructure for improving polycrystalline black silicon photoelectric conversion efficiency and assembly power

• Main Authors: BAI YUPAN, HUANG MING, ZHANG MINGMING, FU SHAOJIAN, XIAO WENMING, LIU QINGPING, CHEN YUAN, YANG XIAOQIN
• Format: Patent
• Language: Chinese; English
• Published: 12.01.2018
• 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 relates to a microstructure for improving polycrystalline black silicon photoelectric conversion efficiency and assembly power and belongs to the technical field of solar cells. The microstructure is advantaged in that a circular groove structure of a suede surface after black silicon texturing is converted into a polygon concave hole structure through a special chemical treatment method, the microscopic closed angle structure is reduced to a certain degree, suede surface and diffusion uniformity is improved, PECVD passivation capability is optimized, an open voltage and a filling factor of the solar cells can be substantially improved, and conversion efficiency of the solar cells and assembly power are further improved. 本发明涉及种提高多晶黑硅光电转换效率及组件功率的微观结构，属于太阳电池技术领域。其特征在于通过特殊的化学处理方法将黑硅制绒后的绒面由圆形凹槽变为多边形凹孔结构，定程度上降低了微观尖角结构，提高了绒面及扩散均匀性，优化了PECVD的钝化能力，此方法可显著提高太阳能电池的开压和填充因子，进步提高太阳能电池的转换效率和组件功率。