Science Advances

Supplementary Materials

This PDF file includes:

  • Section S1. Device characteristics of OLEDs and OPDs
  • Section S2. Detailed description on optical simulation
  • Section S3. Estimation of SNR ratio in a concentric configuration where a circular OLED is surrounded by a ring-type OPD sharing the center
  • Section S4. Summary of overall fabrication process and mask-in-mask concept used for precise alignment among different patterns during thermal evaporation
  • Section S5. Face seal encapsulation and interconnection procedure and characteristics of encapsulated OLEDs and OPDs
  • Section S6. Application of proposed OPOs onto various body parts
  • Section S7. Driving and signal acquisition scheme
  • Section S8. SpO2 calibration method for OPOs
  • Fig. S1. Opto-electrical characteristics of OLEDs and OPDs used in this work.
  • Fig. S2. Ray-tracing example of the proposed simulation model.
  • Fig. S3. Estimation of photo current, total noise, and SNR (= IPH/Itn) of each OLED case.
  • Fig. S4. Overview of fabrication process and pattern definition by jigsaw puzzle–type, mask-in-mask shadow masking method.
  • Fig. S5. Encapsulation and interconnection process and characteristics of the encapsulated devices.
  • Fig. S6. Pictures of the working OPO sensors taken on the various body parts.
  • Fig. S7. Schematic diagram showing the circuit functional blocks for driving of OLEDs and signal acquisition from the OPD of the proposed OPO sensors.
  • Fig. S8. Overview of the calibration method.
  • Fig. S9. Example of SpO2 calibration done at a forefinger.
  • Table S1. Parameters used to estimate D* of the OPD under study.
  • Table S2. Optical parameter of the human skin layers applied to the simulation.
  • References (38, 39)

Download PDF

Files in this Data Supplement: