High-performance amorphous organic semiconductor-based vertical field-effect transistors and light-emitting...

Area of Science:

• Organic electronics
• Semiconductor devices

Background:

• Amorphous organic semiconductors offer advantages in film formation and device fabrication.
• Vertical organic optoelectronic devices are being explored for advanced applications.

Purpose of the Study:

• To construct and evaluate vertical organic field-effect transistors (VOFETs) and vertical organic light-emitting transistors (VOLETs).
• To investigate the performance and stability of these devices using specific amorphous organic semiconductor materials.

Main Methods:

• Fabrication of VOFETs and VOLETs using N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4'-diamine (NPB) and tris(8-hydroxy-quinolinato) aluminum (Alq3).
• Characterization of device performance, including on/off ratio, current density, response time, and brightness.

Main Results:

• Achieved high performance metrics: on/off ratio of ~6 × 10^3, current density of ~40 mA cm^-2, and response time of ~5 ms.
• Demonstrated stable and repeatable device operation with a brightness of 126 cd m^-2 at 20 Hz.
• Utilized amorphous organic semiconductors (NPB and Alq3) for efficient hole injection, transport, and light emission.

Conclusions:

• The developed VOFETs and VOLETs exhibit excellent performance and stability.
• Amorphous organic semiconductors are promising for fabricating efficient and reliable vertical optoelectronic devices.
• These findings highlight the potential of these materials in vertical optoelectronic circuits.