High speed quantum efficiency measurement apparatus utilizing solid state lightsource

A high-speed Quantum Efficiency (QE) measurement device comprising:

• a. at least one device under test (DUT);
• b. at least one conditioned light source, wherein said conditioned light source comprises at least one filtered LED having a less than 50 nm bandwidth, wherein a portion of said conditioned light source is monitored by light source monitoring elements comprising at least one collection optic and at least one photo detector;
• c. delivery optics, wherein said delivery optics direct said conditioned light source to said DUT;
• d. a controller, wherein said controller drives said conditioned light source in a time dependent operation, wherein a response by each said DUT from each said conditioned light source is uniquely identified;
• e. at least one reflectance measurement assembly, wherein said reflectance measurement assembly comprises at least one reflectance collection optic and at least one photo detector disposed to receive a portion of said conditioned light that is reflected from said DUT;
• f. a time-resolved measurement device comprising i) a current measurement device, ii) a voltage measurement device, or i) and ii), wherein said time-resolved measurement device is disposed to resolve i) a current, ii) a voltage or i) and ii) generated in said DUT by each said conditioned light source;
• and
• g. a sufficiently programmed computer disposed to determine and output an internal QE value for each said DUT according to an incident intensity of at least one wavelength of from said conditioned light source and said time-resolved measurement.