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By systematically studying the bias and irradiance dependence of the photocurrent dynamics, and by employing spatially resolved photocurrent mapping, we provide insights into the mechanisms governing the device response. We demonstrate a pronounced irradiance dependence of the response times and reveal decay times of 9.8 ns as well as 3 dB electrical bandwidths exceeding 50 MHz, rendering these devices on par with high-quality, manually exfoliated WSe2 photodetectors. These results establish roll-to-roll exfoliation as a powerful and scalable fabrication technique capable of producing high-speed photodetectors.<\/jats:p>","DOI":"10.1021\/acs.jpclett.6c01579","type":"journal-article","created":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T09:56:42Z","timestamp":1788256602000},"page":"10413-10419","source":"Crossref","is-referenced-by-count":1,"title":["50 MHz WSe2 Photodetectors from Roll-to-Roll\nExfoliated Films"],"prefix":"10.1021","volume":"17","author":[{"given":"Patrick","family":"Michel","sequence":"first","affiliation":[{"name":"University of Tu\u0308bingen , , Auf der Morgenstelle 18 , ,","place":["Tu\u0308bingen, Germany, 72076"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William","family":"Roberts","sequence":"additional","affiliation":[{"name":"University of Tu\u0308bingen , , Auf der Morgenstelle 18 , ,","place":["Tu\u0308bingen, Germany, 72076"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yigit","family":"Sozen","sequence":"additional","affiliation":[{"name":"Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC) , , ,","place":["Madrid, Spain, E-28049"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3384-3405","authenticated-orcid":true,"given":"Andres","family":"Castellanos-Gomez","sequence":"additional","affiliation":[{"name":"Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC) , , ,","place":["Madrid, Spain, E-28049"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2704-3591","authenticated-orcid":true,"given":"Marcus","family":"Scheele","sequence":"additional","affiliation":[{"name":"University of Tu\u0308bingen , , Auf der Morgenstelle 18 , ,","place":["Tu\u0308bingen, Germany, 72076"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,8,26]]},"reference":[{"issue":"1","key":"2026091008093664800_cit1","doi-asserted-by":"publisher","first-page":"29","DOI":"10.1038\/s41699-020-00162-4","article-title":"Bandgap Engineering\nof Two-Dimensional Semiconductor Materials","volume":"4","author":"Chaves","year":"2020","journal-title":"Npj 2D Mater. 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