Zotsatira zaposachedwa za kafukufuku wa organic photodetectors

Ofufuza apanga ndikuwonetsa kuwala kobiriwira komwe kumayamwa ma photodetector owoneka bwino achilengedwe omwe ndi osavuta kugwiritsa ntchito komanso ogwirizana ndi njira zopangira CMOS. Kuphatikiza ma photodetector atsopanowa mu silicone hybrid image sensors kungakhale kothandiza pa ntchito zambiri. Ntchitozi zikuphatikizapo kuyang'anira kugunda kwa mtima pogwiritsa ntchito kuwala, kuzindikira zala ndi zipangizo zomwe zimazindikira kupezeka kwa zinthu zapafupi.

Kaya amagwiritsidwa ntchito m'mafoni a m'manja kapena makamera asayansi, masensa ambiri ojambulira zithunzi masiku ano amachokera ku ukadaulo wa CMOS ndi zowunikira zithunzi zomwe sizili zachilengedwe zomwe zimasintha zizindikiro za kuwala kukhala zizindikiro zamagetsi. Ngakhale kuti zowunikira zithunzi zopangidwa ndi zinthu zachilengedwe zikukopa chidwi chifukwa zingathandize kukonza kukhudzidwa kwa kuwala, mpaka pano zakhala zovuta kupanga zowunikira zithunzi zapamwamba kwambiri.

Wofufuza wina wotsogolera Sungjun Park, wochokera ku Ajou University ku South Korea, anati: “Kuphatikiza ma photodetector achilengedwe mu ma CMOS image sensors omwe amapangidwa mochuluka kumafuna ma organic absorbers omwe ndi osavuta kupanga pamlingo waukulu komanso okhoza kuzindikira zithunzi bwino kuti apange zithunzi zakuthwa pamlingo wapamwamba mumdima. Tapanga ma photodiode achilengedwe owonekera, obiriwira omwe angakwaniritse zofunikira izi.”

Ofufuzawo akufotokoza za chowunikira zithunzi chatsopano cha organic mu magazini ya Optica. Adapanganso chowunikira zithunzi cha hybrid RGB mwa kuyika chowunikira chobiriwira chowoneka bwino chomwe chimayamwa zithunzi za organic pa silicon photodiode yokhala ndi zosefera zofiira ndi zabuluu.

Kyung-Bae Park, mtsogoleri wa gulu lofufuza kuchokera ku Samsung Advanced Institute of Technology (SAIT) ku South Korea, anati: “Chifukwa cha kuyambitsidwa kwa gawo losakanikirana la organic buffer, gawo lobiriwira losankha kuwala lomwe limagwiritsidwa ntchito mu masensa azithunzi awa limachepetsa kwambiri kulumikizana pakati pa ma pixel amitundu yosiyanasiyana, ndipo kapangidwe katsopanoka kangapangitse ma photodiode apamwamba a organic kukhala gawo lalikulu la ma module ojambula zithunzi ndi masensa a photosenser pa ntchito zosiyanasiyana.”

Zipangizo zowunikira zithunzi zachilengedwe zothandiza kwambiri

Zipangizo zambiri zachilengedwe sizoyenera kupanga zinthu zambiri chifukwa chakuti zimakhudzidwa ndi kutentha. Sizingathe kupirira kutentha kwambiri komwe kumagwiritsidwa ntchito pambuyo pa chithandizo kapena zimakhala zosakhazikika zikagwiritsidwa ntchito kutentha pang'ono kwa nthawi yayitali. Pofuna kuthana ndi vutoli, asayansi ayang'ana kwambiri pakusintha gawo la buffer la photodetector kuti akonze kukhazikika, kugwira ntchito bwino, komanso kuzindikira. Kuzindikira ndi muyeso wa momwe sensa ingadziwire bwino zizindikiro zofooka. "Tinayambitsa mzere wa mkuwa wa bath (BCP): C60 hybrid buffer layer ngati gawo loyendetsa ma electron, lomwe limapatsa organic photodetector zinthu zapadera, kuphatikizapo kugwira ntchito bwino kwambiri komanso mphamvu yakuda yochepa kwambiri, yomwe imachepetsa phokoso," akutero Sungjun Park. Photodetector ikhoza kuyikidwa pa silicon photodiode yokhala ndi zosefera zofiira ndi zabuluu kuti ipange sensor yosakanikirana ya chithunzi.

Ofufuzawo akusonyeza kuti chowunikira zithunzi chatsopanochi chili ndi kuchuluka kwa kuzindikira kofanana ndi kwa ma photodiode a silicon wamba. Chowunikiracho chinagwira ntchito mosasunthika kwa maola awiri kutentha kopitilira 150 °C ndipo chinawonetsa kukhazikika kwa ntchito kwa nthawi yayitali kwa masiku 30 pa 85 °C. Chowunikira zithunzichi chikuwonetsanso magwiridwe antchito abwino amitundu.

Kenako, akukonzekera kusintha zida zatsopano zowunikira zithunzi ndi zowunikira zithunzi zosakanikirana kuti zigwiritsidwe ntchito m'njira zosiyanasiyana, monga zowunikira zam'manja ndi zovalidwa (kuphatikiza zowunikira zithunzi za CMOS), zowunikira zapafupi, ndi zida zala zomwe zili paziwonetsero.