Chaudhry, Mujeeb Ullah
Tetzner, Kornelius
Lin, Yen-Hung
Nam, Sungho
Pearson, Christopher
Groves, Chris
Petty, Michael C.
Anthopoulos, Thomas D.
Bradley, Donal D. C.
We report the development of low operating voltages in inorganic-organic hybrid light-emitting transistors (HLETs) based on a solution-processed ZrOx gate dielectric and a hybrid multilayer channel consisting of the heterojunction In2O3/ZnO and the organic polymer "Super Yellow" acting as n- and p-channel/emissive layers, respectively. Resulting HLETs operate at the lowest voltages reported to-date (<10 V) and combine high electron mobility (22 cm(2)/(V s)) with appreciable current on/off ratios (approximate to 10(3)) and an external quantum efficiency of 2 X 10(-2)% at 700 cd/m(2). The charge injection, transport, and recombination mechanisms within this HLET architecture are discussed, and prospects for further performance enhancement are considered.
Chaudhry, Mujeeb Ullah
Tetzner, Kornelius
Lin, Yen-Hung
Nam, Sungho
Pearson, Christopher
Groves, Chris
Petty, Michael C.
Anthopoulos, Thomas D.
Bradley, Donal D.C.
Chaudhry, Mujeeb Ullah
Muhieddine, Khalid
Wawrzinek, Robert
Li, Jun
Lo, Shih-Chun
Namdas, Ebinazar B.
Organic light emitting field effect transistors (LEFETs) integrate light emission of a diode with logic functions of a transistor into a single device architecture. This integration has the potential to provide simplified displays at low costs and access to injection lasing. However, the charge carrier mobility in LEFETs is a limiting factor in realizing high current densities along with a trade-off between brightness and efficiency. Herein, we present a technique controlling the nanoscale morphology of semi-conducting polymers using nanoscale grooved substrates and dip-coating deposition to achieve high current density. We then applied this approach to heterostructure LEFETs and demonstrated brightness exceeding 29000 cd m(-2) at an EQE of 0.4% for a yellow emitter and 9600 cd m(-2) at an EQE of 0.7% for a blue emitter. These results represent a significant advancement in organic optoelectronics and are an important milestone toward the realization of new applications in displays and electrically pumped lasing.
Chaudhry, Mujeeb Ullah
Panidi, Julianna
Nam, Sungho
Smith, Alice
Lim, Jongchul
Tetzner, Kornelius
Patsalas, Panos A.
Vourlias, George
Sit, Wai‐Yu
Firdaus, Yuliar
Heeney, Martin
Bradley, Donal D. C.
Anthopoulos, Thomas D.
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