Dual mode OPV-OLED device with photovoltaic and light-emitting functionalities.

Area of Science:

• Organic electronics
• Optoelectronic devices
• Materials science

Background:

• Organic photovoltaics (OPVs) and organic light-emitting devices (OLEDs) offer advantages like flexibility and solution processability.
• Integrating these devices presents challenges in managing electrical and optical functions.

Purpose of the Study:

• To fabricate and characterize a novel dual-mode OPV-OLED device.
• To achieve decoupling of electricity generation and light emission functionalities within a single device structure.

Main Methods:

• Fabrication of a three-terminal device with an inverted bulk-heterojunction OPV unit and a top-emission phosphorescent OLED unit.
• Utilized sputter-deposited indium tin oxide as the OPV cathode.
• Employed Ag-doped Al as a common OPV/OLED anode and Ag-doped Mg as the OLED cathode.

Main Results:

• The Ag-doped Al common anode reduced surface roughness and leakage current.
• The device achieved a power conversion efficiency of 3.4% for the OPV unit.
• The OLED unit demonstrated an external quantum efficiency of 9.9%.

Conclusions:

• Successful integration of OPV and OLED units in a back-to-back configuration.
• Demonstrated decoupling of electricity generation and light emission functions in a single device.
• The developed device shows potential for advanced optoelectronic applications.