Since EQE is defined as the product of percent absorption and IQE (see Equation ), the IQE can be calculated as the EQE divided by the percent absorption. When we normalized the EQEs with percent absorption to obtain IQEs, we observed that the IQE remains highest for 5 mg/mL PbS QDs (see Figure ) with or without TCA. At increasing PbS film thicknesses, the IQE drops. However, for devices with thicker PbS films, the IQE improvement achieved by the incorporation of TCA is extremely high (27× improvement for 50 mg/mL PbS from (0.006 ± 0.001)% to (0.163 ± 0.026)%). For applications like photovoltaics and night vision, high absorption and high IQE are both required, yet have thus far a rise in absorption has been related to a significant drop in IQE of UC devices. This work presents a large stride towards the goal of simultaneous maximization of IQE and absorption.