In 1997 he became head of the government-sponsored LCD Research Center, which was created
to enhance the R&D activity of academic institutions in Korea (located in Kyung Hee University, Seoul).
He also created an "Information Display" major course for both MS and Ph.D degrees at Kyung Hee.

The TFT-LCD National Lab was established in 1999 and was also headed by Prof. Jang and located in Kyung Hee
Univ. In 2001, the LCD Research Center and the TFT-LCD National lab were combined to form the government-
sponsored Advanced Display Research Center (ADRC), of which Professor Jang currently presides. In 2004 he
formed the Department of Information Displays, created to supply students to display industries. Prof. Jang has served
both as an advisor and the committee chair to the Korean Government at the National Road Map for Displays (2002),
International Cooperation Road Map for Displays (2003) and LCD Road Map (2005) committees. He served as the Program
Chair or Co-Chair in Asia Display’98, 1st IDMC, 2nd IDMC, Asia Display’04 and SID’07 and SID'08.

Throughout his time in the field Prof. Jang has published over 700 papers. Of these some 370 have been published in SCI Journals such as Nature, Advanced Materials and Applied Physics Letters. His work has led him to invent numerous processing techniques and devices. Some of his recent research topics are outlined below:

TFT circuits and TFT displays based on amorphous oxide thin film transistors are being studied for liquid-crystal display, organic light emitting diode and image sensors. High performance and stable TFTs were developed by sputtering process. Solution processed oxide TFT is also studied for display and sensor applications. The filed-effect mobility over 30 cm2/Vs was achieved at the process T of 300oC by using inkjet printing of oxide semiconductor.

We developed a flash lamp annealed poly-Si for TFT applications which can be used for low cost and uniform device performance. The TFT and TFT circuits on plastic are also studied for flexible electronics application.

AMOLED has the features in self-emission, wide viewing angle, high resolution, low power consumption, and high response speed, and thus becomes one of competitive display technologies. ADRC has facilities to make a active-matrix OLED up to 6” diagonal. We have focused on low temperature AMOLED for next generation information display. We use oxide TFT backplane on plastic and inverted OLED for flexible AMOLED. The issues on TFT, TFT circuits, thin film encap and AMOLED driving technologies are being studied.

Printed thin-film transistors are likely to have suitable applications requiring large-area coverage, structural flexibility, low weight, and low cost. We use solution semiconductors for TFT using organic and oxide semiconductors and OLED devices. This research aims for ultralow cost manufacturing of printed electronics.

Printed organic solar cells are likely to have suitable applications requiring flexible, low cost, low weight solar cells. The device structure and transport properties for inverted and conventional OPV and high efficiency Si cells using HIT cells are being studied. Thin-film Si solar cells are also studied using a high growth rate.

Flexible TFT and TFT circuits are being studied using organic and Si TFTs on PI and PEN substrate. The degradation of flexible TFT and TFT circuit under bias-stress are being studied.

Integrated flexible systems for medical and sensor applications are being studied using TFT array, TFT circuits and PV sensor on flexible substrate. The compact system could be built on flexible PCB.