Blue-laser-diode–based high CRI lighting and high-speed visible light communication using narrowband green-/red-emitting composite phosphor film
Amjad Ali, Riffat Tehseen, K. M. Mithilesh, Chao Zhang, Syed Agha Hassnain, Xiao Chen, Xingqi Yang, Faizan Ur Rehman, Wenmin Ge, Ying Ye, Jing Xu
Abstract
We experimentally demonstrate high-speed visible light communication (VLC) and high-quality solid-state lighting (SSL) using polymethyl-methacrylate-doped phosphor film based on cesium lead bromide quantum dot ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow class="MJX-TeXAtom-ORD"><mml:mtext mathvariant="bold">CsPbB</mml:mtext></mml:mrow><mml:mrow class="MJX-TeXAtom-ORD"><mml:msub><mml:mrow class="MJX-TeXAtom-ORD"><mml:mtext mathvariant="bold">r</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> -QD) and potassium fluorosilicate <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow class="MJX-TeXAtom-ORD"><mml:msub><mml:mtext>K</mml:mtext><mml:mn>2</mml:mn></mml:msub></mml:mrow><mml:mtext>Si</mml:mtext><mml:mrow class="MJX-TeXAtom-ORD"><mml:msub><mml:mtext>F</mml:mtext><mml:mn>6</mml:mn></mml:msub></mml:mrow><mml:mrow class="MJX-TeXAtom-ORD"><mml:mo>:</mml:mo></mml:mrow><mml:mtext>M</mml:mtext><mml:mrow class="MJX-TeXAtom-ORD"><mml:msup><mml:mtext>n</mml:mtext><mml:mrow class="MJX-TeXAtom-ORD"><mml:mn>4</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> , which is excited by a blue gallium nitride laser diode. A 1.6 Gbps data rate is achieved by employing a non-return-to-zero on–off keying modulation scheme. The measured bit error rate of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2.7</mml:mn><mml:mo>×</mml:mo><mml:mrow class="MJX-TeXAtom-ORD"><mml:msup><mml:mn>10</mml:mn><mml:mrow class="MJX-TeXAtom-ORD"><mml:mo>−</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> adheres to the standard threshold ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>3.8</mml:mn><mml:mo>×</mml:mo><mml:mrow class="MJX-TeXAtom-ORD"><mml:msup><mml:mn>10</mml:mn><mml:mrow class="MJX-TeXAtom-ORD"><mml:mo>−</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> ) of forward error correction. Moreover, the generated white-light source has a high color rendering index of 93.8 and a correlated color temperature of 4435 K, and it exhibits a Commission Internationale de l’Eclairage (CIE) 1931 chromaticity coordinate at (0.3556, 0.3520), which is close to the ideal CIE value of white light (0.3333, 0.3333). This work opens up exciting possibilities for future high-speed indoor VLC and high-quality SSL.