Förster resonant energy transfer (FRET) can be an efficient mechanism between densely packed fluorescent emitters. It plays a key role in photosynthesis but may also detrimental. In optoelectronic devices for instance, FRET funnels to quenching sites and favors losses. Here, we image individual self-assembled chains of stacked CdSe nanoplatelets demonstrate fluorescence intermittency (blinking)...

We demonstrate reduced surface recombination velocity (SRV) and enhanced power-conversion efficiency (PCE) in mixed-cation mixed-halide perovskite solar cells by using (3-aminopropyl)trimethoxysilane (APTMS) as a passivator. show the APTMS serves to passivate defects at surface, while also decoupling from detrimental interactions C60 interface. measure SRV of ?125 ± 14 cm/s, concomitant increas...

The effect of ion energy in a focused beam the range 12-30 keV on formation depth nonradiative recombination centers during etching Al 0.18 Ga 0.82 As/GaAs/Al As double heterostructure has been studied. It is shown that an increase leads to concentration and propagation radiation defects. was found with energies above 15 keV, defects exceeds 900 nm, which does not correspond calculations Stoppi...

All-inorganic halide perovskites have thus far exhibited better thermal stability but lower power conversion efficiency (PCE), compared with their organic–inorganic hybrid counterparts. The experimentally observed nonradiative recombination loss is commonly attributed to the prevalence of native deep defects, yet exact microscopic origin remains elusive. Based on density functional theory calcu...

Thin-film Cu(In,Ga)Se2 solar cells reach power conversion efficiencies exceeding 23% and nonradiative recombination in the bulk is reported to limit device performance. The diode factor has not received much attention, although it limits fill factor, therefore efficiency, for state-of-the-art cells. Herein, of absorbers, measured by photoluminescence spectroscopy, cells, current–voltage capacit...

The last decade has witnessed great progress in photovoltaic technology based on organometal halide perovskites because of their low nonradiative recombination loss, long carrier lifetime, and diffusion length. excellent optical properties easy preparation perovskite-based products enable wide applications electro-optical opto-electrical conversions. In this review, photoinduced free carriers, ...

Using time-resolved photoluminescence (PL) measurements, we present an experimental verification for 100% internal quantum efficiency (IQE) of III-N wells at low temperatures. Conventional IQE such as temperature- and power-dependent PL, require a low-temperature normalization, where usually is assumed. This assumption neglects remaining nonradiative recombination that may be even cryogenic Fro...