A corona modulation device structure and mechanism based on perovskite quantum dots random laser pumped using an electro
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RESEARCH ARTICLE
A corona modulation device structure and mechanism based on perovskite quantum dots random laser pumped using an electron beam Yan ZHU, Yining MU (✉), Fanqi TANG, Peng DU, Hang REN School of Science, Changchun University of Science and Technology, Changchun 130022, China
© Higher Education Press 2020
Abstract Although laser pumping using electron beam (EB) has high transient power output and easy modulation based on perovskite quantum dot (PQD) film, its lasing emitting direction is the same as the pumped EB’s direction. Thus, realizing the conventional direct device structure through the film lasing mechanism is extremely difficult. Therefore, using the random lasing principle, herein, we proposed a corona modulation device structure based on PQDs random laser pumped using an EB. We discussed and stimulated the optimized designed method of the device in terms of parameters of the electronic optical device and the utilization ratio of output power and its modulation extinction ratio, respectively. According to the simulation results, this type of device structure can effectively satisfy the new random lasing mechanism in terms of high-speed and high-power modulation. Keywords corona, modulation, perovskite quantum dot (PQD), random laser, electron beam (EB)
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Introduction
Perovskite quantum dot (PQD) material exhibits highly external quantum efficiency, excellent exciton confinement, and short carrier lifetime that are superior to conventional luminescence materials [1–5], which has effectively attracted research attention in the luminescence field [6–10]. Currently, an increasing number of distinguished studies have reported PQD optical pumping laser and electric injection through light-emission. In addition, with the rapid development in PQD material manufacturing and gradual improvement of the device’s theory, some Received May 18, 2020; accepted July 2, 2020 E-mails: [email protected], [email protected]
scholars have studied PQD emitting light devices for visual optical communication. For example, white light by electric injection that reaches 10.9% of external quantum efficiency has been realized using trichromatic hybrid halide PQDs [11]. PQD light-emitting diodes (LEDs) with an external quantum efficiency has exceeded 20% and its lifespan has been nearly 100 h too [12]. Changing the ligands of PQDs, the laser threshold was reduced and the stability of the material was improved [13]. However, as a typical semiconductor device structure, an inherent technology paradox exists between the LED’s output power and modulation bandwidth. Namely, the crosssectional area of the LED junction is directly and inversely proportional to the output power and modulation bandwidth, respectively, which generates the power gainbandwidth product constraint [14–16]. Hence, the constraint will substantially limit the PQD LED’s transient characteristics in the communication field. Furthermore, PQD optical-pumping is a cutting-edge nad popular research subject. For example, Saudi scientists utilized PQDs as color conv
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