Kunethemba lokwandisa ukusebenza kahle kwamaphaneli elanga e-silicon yakudala

Akuyona imfihlo ukuthi amaphaneli elanga e-silicon athandwayo anemikhawulo yokuthi aguqula kanjani ukukhanya kube ugesi. Lokhu kungenxa yokuthi i-photon ngayinye ikhipha i-electron eyodwa kuphela, nakuba amandla ezinhlayiyana zokukhanya anganela ukukhipha ama-electron amabili. Ocwaningweni olusha, ososayensi be-MIT bakhombisa ukuthi lo mkhawulo oyisisekelo unganqotshwa, uvula indlela yamaseli elanga e-silicon ngokusebenza kahle okuphezulu kakhulu.

Ikhono le-photon lokukhipha ama-electron amabili lagunyazwa ngokomqondo cishe eminyakeni engama-50 edlule. Kodwa ukuhlola okuyimpumelelo kokuqala kwenziwa kabusha eminyakeni engu-6 edlule. Khona-ke, ingqamuzana lelanga elenziwe ngezinto eziphilayo lasetshenziswa njengokuhlola. Kungaba isilingo ukudlulela ku-silicon esebenza kahle futhi echichimayo, into ososayensi abakwazile ukuyifinyelela manje ngomsebenzi omkhulu kakhulu.

Ngesikhathi sokugcina ukuhlola iphumelele ekudaleni i-silicon solar cell, umkhawulo wokusebenza kahle kwethiyori unyuswe kusuka ku-29,1% kuya ku-35%, futhi lokhu akuwona umkhawulo. Ngeshwa, ngenxa yalokhu, i-solar cell kwakudingeka yenziwe inhlanganisela yezinto ezintathu ezahlukene, ngakho-ke kulesi simo akunakwenzeka ukudlula nge-silicon ye-monolithic. Lapho ihlangene, i-solar cell iyisemishi elenziwe ngezinto eziphilayo. i-tetracene ngesimo sefilimu engaphezulu, ifilimu encane kakhulu (ama-athomu amaningana) ye-hafnium oxynitride futhi, empeleni, i-silicon wafer.

Isendlalelo se-tetracene simunca i-photon enamandla amakhulu futhi siguqule amandla ayo abe ama-excitation amabili anhlanhlathayo kusendlalelo. Lezi yizinto ezibizwa ngokuthi ama-quasiparticles ama-excitons. Inqubo yokuhlukanisa yaziwa ngokuthi i-singlett exciton fission. Ngokwesilinganiso esinzima, ama-exciton aziphatha njengama-electron, futhi lezi zisusa zingasetshenziswa ukukhiqiza amandla kagesi. Umbuzo uwukuthi ungadlulisa kanjani lezi zinjabulo ku-silicon nangale kwalokho?

Ungqimba oluncane lwe-hafnium oxynitride lwaba uhlobo lwebhuloho phakathi kwefilimu ye-tetracene engaphezulu ne-silicon. Izinqubo kulesi singqimba kanye nemiphumela engaphezulu ku-silicon iguqula ama-exciton abe ama-electron, bese yonke into iqhubeka njengokujwayelekile. Ukuhlolwa kwakwazi ukukhombisa ukuthi lokhu kwandisa ukusebenza kahle kweseli yelanga ku-spectra eluhlaza okwesibhakabhaka nokuhlaza. Ngokusho kososayensi, lokhu akuwona umkhawulo wokwandisa ukusebenza kahle kwe-silicon solar cell. Kodwa nobuchwepheshe obethulwa kuzothatha iminyaka ukuthi budayiswe.

Source: 3dnews.ru