Hyperspectral Characterization of Organic Photovoltaics

Mapping Deposition Uniformity, Local Defects, and Phase Segregation

Organic solar cells (OSCs) have drawn significant interest due to their lightweight, semitransparent, bandgap-tunable, and scalable manufacturing properties.Photon’s IMA hyperspectral microscope is a powerful tool for characterizing critical features such as deposition uniformity, film defects, and phase segregation.

IMA supports single or multiple excitation sources, including LEDs and lasers with wavelengths covering the VIS-IR spectrum. It enables researchers to map the photoluminescence (PL), bandgap and implied Voc signal across an entire device to identify regions of high charge recombination and track the effects of parameters such as thermal annealing. IMA’s diffraction-limited spectral resolution facilitates the direct correlation of structural morphology with local chemical and optoelectronic performance, helping to shine light on the degradation mechanisms impacting performance.

Complementing IMA’s capabilities is Photon’s Laser-Line Tunable Filter (LLTF). This tool is the perfect companion for a supercontinuum-based, high-precision External Quantum Efficiency (EQE) measurement system, providing researchers with detailed insights into OPV absorption efficiency to guide R&D optimization.