Fig. 2: Optoelectronic and thermal characteritics of LEDs in the microprobe.
From: A wireless, implantable optoelectrochemical probe for optogenetic stimulation and dopamine detection
a Electroluminescence spectrum of the InGaN blue LED. Inset: optical photograph of the microprobe. b External quantum efficiencies (EQEs) for LEDs with and without diamond/PEDOT:PSS coatings, under different injection currents. c Angular distribution of optical emissions for LEDs with and without diamond/PEDOT:PSS coatings. d Measured (dots) and simulated (dashed lines) maximum temperature rises above room temperature on the top surface of the LED probes (with and without diamond/PEDOT:PSS coatings) as a function of pulsed currents (frequency 20 Hz and duty cycle 20%). e, f Simulated (left) and measured (right) temperature distributions the LED probes (current 3 mA, frequency 20 Hz and duty cycle 20%), e with and f without diamond/PEDOT:PSS coatings
