The work will boost the practical applications of PC in irradiance sensitive devices.
MMF is the factor which expresses the quantity more or less irradiance observed by the device under test at current conditions compared to the reference device [10].
Under illumination by calibrated AM 1.5G simulated solar irradiance at 100 mW/cm2, the P3HT PC61BM device with the self-assembled Ag NP layer exhibited a higher J sc than the control device (Fig. 3b).
Whatever the light-source, the effectiveness of phototherapy devices can be compromised by erratic power supply, inadequate skin exposure from overcrowding with multiple infants placed under a single device, sub-optimal irradiance levels, and poor device maintenance [ 18, 19].
Electrical losses in a device designed for a high irradiance, result in 18%abs.
These models allow calculating the main electrical parameters of the device from its operating conditions (irradiance, cell temperature, spectral distribution of the radiation, etc).
The responsivity is calculated by the following formula: R = I/AE, where R is the responsivity, I is the measured photocurrent, A is the active area of the photodetector device, and E is the irradiance intensity of the light source, which is measured by a standard light power meter.
LEDT (MOLIMEDpen® device; 950 nm wavelength, 80 mW/cm2 irradiance; 1 to 9 J/cm2 energy density) was applied directly to the skin of the incision site.
Regardless the irradiance level, optical losses further increase if the device is illuminated with a Gaussian instead of an ideal flattop beam profile.
where m is the order of the Lambertian emission, A is the photodetector area, d is the distance between the transmitter and user device, φ is the angle of irradiance, ψ is the angle of incidence, T s is the signal transmission coefficient of an optical filter, g is the gain of an optical concentrator, and ψ c is the receiver field of view (FOV).
The dual-cure resin cement specimens were then light cured for 20 s from two opposite sides with a quartz-tungsten halogen light-curing device (Hilux 200, Benlioglu, Ankara, Turkey) with an irradiance of 600 mW/cm2 and further cured in a light-curing unit (Dentacolor XS; Heraeus-Kulzer, Wehrheim, Germany) for an additional 90 s.
