Optoelectronic Modelling, Circuit Design and Modulation for Polymer-Light Emitting Diodes for Visible Light Communication Systems
Optoelectronic Modelling, Circuit Design and Modulation for Polymer-Light Emitting Diodes for Visible Light Communication Systems
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DOI：
10.1109/ict.2019.8798790
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发表时间：
2019-04
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影响因子：
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通讯作者：
A. Burton;Alessandro Minotto;P. Haigh;Zabih Ghassemlooy;H. L. Minh;F. Cacialli;I. Darwazeh
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文献类型：
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作者：
A. Burton;Alessandro Minotto;P. Haigh;Zabih Ghassemlooy;H. L. Minh;F. Cacialli;I. Darwazeh
本文研究了有机聚合物发光二极管 (PLED) 在可见光通信 (VLC) 中的应用。我们使用商用发光聚合物制备了蓝色和绿色发光 PLED，然后表征了器件发射（光谱和功率），并提取了其电路参数，用于小信号驱动的电气等效模型。此外，我们还对器件在连续驱动一段时间（~ 4 小时）内的带宽 ($\boldsymbol{B_{mod}}$) 进行了表征，发现对于蓝色 PLED，$\boldsymbol{B_{mod}}$ 从最初的 750 kHz 下降到~250 kHz 的稳态。人们发现，在测试开始时，发绿光的器件受益于~1.5 MHz的扩展$\boldsymbol{B_{mod}}$，然后稳定到~850 kHz。此外，通过添加一阶 RC 滤波器，我们表明，蓝色 PLED 的稳态 $\boldsymbol{B_{mod}}$ 可以增加约 3 倍，从而在完整的 VLC 系统中允许 > 1 Mbps 的非返回零开关键控 (NRZ OOK) 数据传输。
This paper investigates the use of organic polymer light emitting diodes (PLEDs) for the use in visible light communications (VLC). We prepared blue and green emitting PLEDs using commercial light-emitting polymers, and then characterised the device emission (spectrum and power), and extracted their circuit parameters for their electrical equivalent model for driving with small signals. In addition, we characterised the bandwidth ($\boldsymbol{B_{mod}}$) of the devices over a period of continuous driving (∼ 4 h) and found that for the blue PLEDs the $\boldsymbol{B_{mod}}$ decreased from an initial 750 kHz to a steady state of ∼250 kHz. The green-emitting devices were found to benefit from an extended $\boldsymbol{B_{mod}}$ of ∼1.5 MHz at the beginning of the test, which then stabilised to ∼850 kHz. Furthermore, with the addition of a first order RC filter we show that, the steady state $\boldsymbol{B_{mod}}$ of the blue PLED cane be increased by a factor of ∼3, thus allowing > 1 Mbps non-return to zero on-off keying (NRZ OOK) data transmission in a complete VLC system.