Control of defect processes in photovoltaic materials is essential for realizing high-efficiency
solar cells and related optoelectronic devices. Native defects and extrinsic dopants tune the …

After a focused effort over the last decade, order‐of‐magnitude improvements in doping and
electro‐optical characteristics (radiative efficiency, carrier lifetime, and passivation) have …

There is widespread interest in reaching the practical efficiency of cadmium telluride (CdTe)
thin-film solar cells, which suffer from open-circuit voltage loss due to high surface …

CdTe thin-film solar cells are now the main industrially established alternative to silicon-
based photovoltaics. These cells remain reliant on the so-called chloride activation step in …

Due to the lowest‐cost and best reliability, CdTe solar cells are the leading thin‐film
photovoltaic technology. Increasing open‐circuit voltage by reducing recombination …

Perovskite solar cells have rapidly been developed over the past several years. Choice of
the most suitable solar cell structure is crucial to improve the performance further. Here, we …

We applied time-resolved pump-probe spectroscopy based on free carrier absorption and
light diffraction on a transient grating for direct measurements of the carrier lifetime and …

Using two-photon tomography, carrier lifetimes are mapped in polycrystalline CdTe
photovoltaic devices. These 3D maps probe subsurface carrier dynamics that are …

Herein, we describe the selective mapping of surface charge carriers, achieved using
scanning ultrafast electron microscopy, for visualization of light-triggered carrier dynamics …

For decades, polycrystalline CdTe thin films for solar applications have been restricted to
grain sizes of microns or less whereas other semiconductors such as silicon and perovskites …