With the development of semiconductor technology, electronic packaging technology with increasingly high integration density is needed. Solder is a traditional interconnect material widely used in electronic packaging...
With the development of semiconductor technology, electronic packaging technology with increasingly high integration density is needed. Solder is a traditional interconnect material widely used in electronic packaging industry, but now more attention is being paid to isotropic conductive adhesive (ICA) as an environmentally friendly interconnect material with advantages of low processing temperature, simple processing conditions and good manufacturability. However, compared with solder, reliability studies of ICA are still scarce. This paper aims to enrich the reliability study of ICA, by studying the reliability of a novel fast curing ICA which has a curing degree of 97.8% with 3 min of curing time at 150 °. It was found that after 85 °/85% RH humidity and heat test for 160 h, the bulk resistivity of ICA decreased about 82% and then remained stable. Besides, ICA embrittled as aging time extending.
Serious climate changes and energy-related environmental problems are currently critical issues in the world. In order to reduce carbon emissions and save our environment, renewable energy harvesting technologies will...
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Correction for 'Atomically flat semiconductor nanoplatelets for light-emitting applications' by Bing Bai , , 2023, , 318-360, https://***/10.1039/D2CS00130F.
Correction for 'Atomically flat semiconductor nanoplatelets for light-emitting applications' by Bing Bai , , 2023, , 318-360, https://***/10.1039/D2CS00130F.
Decreasing perovskite nanocrystal size increases radiative recombination due to the quantum confinement effect, but also increases the Auger recombination rate which leads to carrier imbalance in the emitting layers o...
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Decreasing perovskite nanocrystal size increases radiative recombination due to the quantum confinement effect, but also increases the Auger recombination rate which leads to carrier imbalance in the emitting layers of electroluminescent devices. Here, we overcome this trade-off by increasing the exciton effective mass without affecting the size, which is realized through the trace Cd 2+ doping of formamidinium lead bromide perovskite nanocrystals. We observe an ~2.7 times increase in the exciton binding energy benefiting from a slight distortion of the [BX 6 ] 4− octahedra caused by doping in the case of that the Auger recombination rate is almost unchanged. As a result, bright color-saturated green emitting perovskite nanocrystals with a photoluminescence quantum yield of 96 % are obtained. Cd 2+ doping also shifts up the energy levels of the nanocrystals, relative to the Fermi level so that heavily n -doped emitters convert into only slightly n -doped ones; this boosts the charge injection efficiency of the corresponding light-emitting diodes. The light-emitting devices based on those nanocrystals reached a high external quantum efficiency of 29.4 % corresponding to a current efficiency of 123 cd A −1 , and showed dramatically improved device lifetime, with a narrow bandwidth of 22 nm and Commission Internationale de I'Eclairage coordinates of (0.20, 0.76) for color-saturated green emission for the electroluminescence peak centered at 534 nm, thus being fully compliant with the latest standard for wide color gamut displays.
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