  Interest in the superconducting proximity effect has been reinvigorated
recently by novel optoelectronic applications as well as by the possible
emergence of the elusive Majorana fermion at the interface between topological
insulators and superconductors. Here we produce high-temperature
superconductivity in Bi2Se3 and Bi2Te3 via proximity to Bi2Sr2CaCu2O8+{\delta},
in order to access increasing temperature and energy scales for this
phenomenon. This was achieved by a new mechanical bonding technique we
developed, enabling the fabrication of high-quality junctions between
materials, unobtainable by conventional approaches. We observe
proximity-induced superconductivity in Bi2Se3 and Bi2Te3 persisting up to at
least 80K, a temperature an order of magnitude higher than any previous
observations. Moreover, the induced superconducting gap in our devices reaches
values of 10mV, significantly enhancing the relevant energy scales. Our results
open new directions for fundamental studies in condensed matter physics and
enable a wide range of applications in spintronics and quantum computing.
