7.5L: Late‐News Paper: Cathodoluminescence Quantum Efficiency of Quantum Dot Thin Films

A thin film of quantum dots (QD) was used to visualize the local photo-response of polycrystalline CdTe solar cells by down-converting an electron beam of high energy to photons of visible light. The efficient photon generation in the QD film is compared to cathodoluminescence of the high-purity bulk semiconductors and phosphor.