{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T01:40:43Z","timestamp":1784166043446,"version":"3.55.0"},"reference-count":29,"publisher":"Wiley","issue":"24","license":[{"start":{"date-parts":[[2011,10,21]],"date-time":"2011-10-21T00:00:00Z","timestamp":1319155200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Small"],"published-print":{"date-parts":[[2011,12,16]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The optical properties of PbSe\/CdSe core\/shell quantum dots with core sizes smaller than 4 nm in the 5\u2013300 K range are reported. The photoluminescence spectra show two peaks, which become increasingly separated in energy as the core diameter is reduced below 4 nm. It is shown that these peaks are due to intrinsic exciton transitions in each quantum dot, rather than emission from different quantum dot sub\u2010ensembles. Most likely, the energy separation between the peaks is due to inter\u2010valley coupling between the L\u2010points of PbSe. The temperature dependence of the relative intensities of the peaks implies that the two emitting states are not in thermal equilibrium and that dark exciton states must play an important role.<\/jats:p>","DOI":"10.1002\/smll.201101819","type":"journal-article","created":{"date-parts":[[2011,10,21]],"date-time":"2011-10-21T12:42:43Z","timestamp":1319200963000},"page":"3493-3501","source":"Crossref","is-referenced-by-count":33,"title":["Two\u2010Fold Emission From the S\u2010Shell of PbSe\/CdSe Core\/Shell Quantum Dots"],"prefix":"10.1002","volume":"7","author":[{"given":"Dominika","family":"Grodzi\u0144ska","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wiel H.","family":"Evers","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renee","family":"Dorland","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos","family":"van 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