Quantum rods LEDs for lighiting and displays
Abhishek Kumar Srivastava a
a The Hong Kong University of Science and Technology,, Kowloon, Hong Kong
Proceedings of International Conference on Emerging Light Emitting Materials (EMLEM23)
Peyia, Cyprus, 2023 November 13th - 15th
Organizers: Grigorios Itskos, Maksym Kovalenko and Maryna Bodnarchuk
Invited Speaker, Abhishek Kumar Srivastava, presentation 033
Publication date: 18th August 2023

The aligned quantum rods emit polarized light that could potentially improve the efficiency of the LCD backlights. Semiconductor quantum rods (QRs), due to their unique shape-dependent emission properties, have been a center of attraction for the last decade [1-8]. These materials not only exhibit the quantum confinement effect due to their size, but also show polarized photoluminescence properties. In this talk, we will discuss the High-quality alignment of the QRs showing a high polarization ratio for the PL. We developed a photoaligned quantum rod enhancement films (QREF) containing red and green QRs, for their application in LCD backlights. A 6-inch QREF was printing using Inkjet printing and later deployed to the LCD [5-8]. The polarization ratio of the emitted light for the printed QREFs is measured to be ~ 7:1 (see fig. 1 (a-c)) [8]. Later, we developed the LCD backlight. The intensity of the QREF backlight is measured at ~ 7200 nits, which becomes ~561 nits after the LCD panel shows an optical efficiency of ~7.8%, which is approximately 1.7 times higher than conventional LCD. In conclusion, we can say that the photoaligned quantum rods can double the efficiency of modern display devices. In this talk, we will explore the detail of photoalignment of QRs and their application in displays.  


The financial support from the ITF Grant ITS/370/16 from ITC Hong Kong government, The RGC of Hong Kong SAR (Grant No. 26202019), Huawei, Microlite Ltd., CSOT China,  TTC HKUST, Transconsultant Ltd, ASTRI HK, and the State Key Laboratory of Advanced Displays and Optoelectronics Technologies, Hong Kong University of Science and Technology are gratefully acknowledged.

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info