Efficient 1.55 micrometer light sources are needed for telecom and infrared photonics, but realizing them with perovskite quantum dots is challenging due to bandgap limitations. Li et al. used Er3 + ...

Apple’s Tim Cook will relinquish the CEO position, leaving behind an impressive legacy after growing the company to a $4 trillion market capitalization from under $350 billion 15 years ago. Over ...