Department of Chemistry, University of Chicago, Chicago, IL 60637, USA. James Franck Institute, University of Chicago, Chicago, IL 60637, USA.
Materials Research Collaborative Access Team (MRCAT) Sector 10 Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA. Department of Physics, Advanced Materials Group, Illinois Institute of Technology, Chicago, IL 60616, USA.
Science. 2015 Jan 23;347(6220):425-8. doi: 10.1126/science.1260501. Epub 2015 Jan 1.
We propose a general strategy to synthesize largely unexplored soluble chalcogenidometallates of cadmium, lead, and bismuth. These compounds can be used as "solders" for semiconductors widely used in photovoltaics and thermoelectrics. The addition of solder helped to bond crystal surfaces and link nano- or mesoscale particles together. For example, CdSe nanocrystals with Na2Cd2Se3 solder was used as a soluble precursor for CdSe films with electron mobilities exceeding 300 square centimeters per volt-second. CdTe, PbTe, and Bi2Te3 powders were molded into various shapes in the presence of a small additive of composition-matched chalcogenidometallate or chalcogel, thus opening new design spaces for semiconductor technologies.
我们提出了一种通用策略，用于合成在很大程度上尚未探索过的镉、铅和铋的可溶性硫属化物金属酸盐。这些化合物可用作广泛用于光伏和热电的半导体的“焊料”。焊料的添加有助于键合晶体表面并将纳米或中尺度颗粒连接在一起。例如，具有 Na2Cd2Se3 焊料的 CdSe 纳米晶体被用作电子迁移率超过 300 平方厘米每伏特秒的 CdSe 薄膜的可溶性前体。在少量组成匹配的硫属化物金属酸盐或硫属凝胶添加剂的存在下，将 CdTe、PbTe 和 Bi2Te3 粉末模制成各种形状，从而为半导体技术开辟了新的设计空间。
