3rd Physics Institute and Research Center SCoPE, University of Stuttgart, 70550 Stuttgart, Germany.
Nat Commun. 2012 Jan 17;3:628. doi: 10.1038/ncomms1637.
Single-photon emitters have been considered for applications in quantum information processing, quantum cryptography and metrology. For the sake of integration and to provide an electron photon interface, it is of great interest to stimulate single-photon emission by electrical excitation as demonstrated for quantum dots. Because of low exciton binding energies, it has so far not been possible to detect sub-Poissonian photon statistics of electrically driven quantum dots at room temperature. However, organic molecules possess exciton binding energies on the order of 1eV, thereby facilitating the development of an electrically driven single-photon source at room temperature in a solid-state matrix. Here we demonstrate electroluminescence of single, electrically driven molecules at room temperature. By careful choice of the molecular emitter, as well as fabrication of a specially designed organic light-emitting diode structure, we were able to achieve stable single-molecule emission and detect sub-Poissonian photon statistics.
单光子发射器已被认为可应用于量子信息处理、量子密码学和计量学。为了实现集成并提供电子光子接口，通过电激发来激发单光子发射是很有意义的，这已经在量子点中得到了证明。由于激子结合能较低，到目前为止，还不可能在室温下探测到电驱动量子点的亚泊松光子统计。然而，有机分子具有 1eV 量级的激子结合能，从而有利于在固态基质中开发室温下电驱动的单光子源。在这里，我们展示了在室温下单分子电驱动发光的情况。通过仔细选择分子发射器，以及设计专门的有机发光二极管结构，我们能够实现稳定的单分子发射并探测到亚泊松光子统计。
