High‐Performance Shortwave‐Infrared Light‐Emitting Devices Using Core–Shell (PbS–CdS) Colloidal Quantum Dots

Core–shell PbS–CdS quantum dots enhance the peak external quantum efficiency of shortwave-infrared light-emitting devices by up to 50–100-fold (compared with core-only PbS devices). This is more than double the efficiency of previous quantum-dot light-emitting devices operating at wavelengths beyond 1 μm, and results from the passivation of the PbS cores by the CdS shells against in situ photoluminescence quenching. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.