{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T16:27:26Z","timestamp":1762100846326,"version":"3.41.2"},"reference-count":43,"publisher":"AIP Publishing","issue":"3","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2008,8,1]]},"abstract":"<jats:p>To enhance light harvesting in organic photovoltaic devices, we propose the incorporation of a metal (aluminum) mask film in the system\u2019s usual layout. We fabricate devices in a sandwich geometry, where the mask (nanoindented with a periodic array of holes of sizes d and spacing s) is added between the transparent electrode and the active layer formed by a blend of the semiconducting polymer P3HT and substituted fullerene. Its function is to promote trapping of the incident light into the device\u2019s cavity (the region corresponding to the active layer). For d, we set a value that allows light diffraction through the holes in the relevant absorption range of the polymer. To optimize the mask structure, we consider a very simple model to determine the s leading to trapped fields that are relatively intense and homogeneous within the device. From measurements of the action spectra, we show that, indeed, such architecture can considerably improve the resulting photocurrent efficiencies\u2014one order of magnitude in the best situation studied.<\/jats:p>","DOI":"10.1063\/1.2968250","type":"journal-article","created":{"date-parts":[[2008,8,16]],"date-time":"2008-08-16T01:53:16Z","timestamp":1218851596000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":11,"title":["Improving light harvesting in polymer photodetector devices through nanoindented metal mask films"],"prefix":"10.1063","volume":"104","author":[{"given":"A. G.","family":"Macedo","sequence":"first","affiliation":[{"name":"Universidade Federal do Paran\u00e1 1 Departamento de F\u00edsica, , 81531-990 Curitiba-PR, Brazil"},{"name":"Universidade de Aveiro 2 Departamento de F\u00edsica, , 3810-193 Aveiro, Portugal"}]},{"given":"F.","family":"Zanetti","sequence":"additional","affiliation":[{"name":"Universidade Federal do Paran\u00e1 1 Departamento de F\u00edsica, , 81531-990 Curitiba-PR, Brazil"}]},{"given":"A.","family":"Mikowski","sequence":"additional","affiliation":[{"name":"Universidade Federal do Paran\u00e1 1 Departamento de F\u00edsica, , 81531-990 Curitiba-PR, Brazil"}]},{"given":"J. C.","family":"Hummelen","sequence":"additional","affiliation":[{"name":"University of Groningen 3 Zernike Institute for Advanced Materials, , Nijenborgh 4, NL-9747AG Groningen, The Netherlands"}]},{"given":"C. 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