SBIR Phase I: Advanced Semitransparent CdTe PV

SBIR 第一阶段：先进的半透明 CdTe 光伏

• 批准号: 1113818
• 负责人: Alvin Compaan
• 金额: $ 15万
• 依托单位: Xunlight 26 Solar, LLC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1113818&HistoricalAwards=false
• 关键词: SBIR; Phase; Advanced; Semitransparent; CdTe

This Small Business Innovation Research (SBIR) Phase I project aims to develop ultra-thin CdTe solar cells by improving the back-contact interface, which facilitates the transport of positive charge carriers (holes) into the back contact electrode and simultaneously reflect negative charge carriers (electrons) toward the main junction where they are collected by the transparent conducting electrode. Two complementary approaches will be taken to achieve this objective. Suitable dopant elements such as phosphorous will be added to create a heavily doped p-type layer before applying the back contact. The heavy doping will create an electron reflector and facilitate a hole-conducting semiconductor or metal contact. The second pathway will involve magnetron sputter deposition of suitable p-type semiconductors such as ZnTe doped with nitrogen or copper. Preliminary studies have shown promise with thick CdTe layers and CdTe crystals. This project will extend the studies to ultra-thin, semitransparent CdTe solar cells to validate the efficacy of either or both approaches as applied to PV window structures.The broader/commercial impact of this project will be the potential to provide an improved back-contact interface for semitransparent photovoltaic windows, which will help move these power-producing windows toward 10% efficiency while maintaining good transparency. The estimated annual market for curtain-wall glass applications in the U.S. is about 150 million square feet (14 million square meters). Value-added PV window coatings for high-rise office buildings can provide a substantial reduction of solar heat loads while delivering a major fraction of the electricity needed for these buildings.

这项小型企业创新研究（SBIR）第一阶段项目旨在通过改进后接触界面来开发超薄碲化镉太阳能电池，从而促进正电荷载流子（空穴）传输到后接触电极，同时将负电荷载流子（电子）反射到主结，在主结中，它们被透明导电电极收集。将采取两种相辅相成的办法来实现这一目标。在应用背触点之前，将添加合适的掺杂元素，如磷，以形成重掺杂的p型层。重掺杂将产生电子反射器，并促进空穴导电半导体或金属接触。第二种途径将涉及磁控溅射沉积合适的p型半导体，如掺杂氮或铜的ZnTe。初步的研究表明，厚的碲化镉层和碲化镉晶体是有希望的。该项目将把研究扩展到超薄半透明碲化镉太阳能电池，以验证任一或两种方法应用于光伏窗口结构的有效性。该项目更广泛的商业影响将是为半透明光伏窗口提供改进的后接触界面，这将有助于将这些发电窗口的效率提高到10%，同时保持良好的透明度。据估计，美国每年的幕墙玻璃应用市场约为1.5亿平方英尺（1400万平方米）。用于高层办公建筑的增值光伏窗户涂层可以大幅减少太阳能热负荷，同时提供这些建筑所需的大部分电力。