Boithuto bo hlalosa buka ea "All-perovskite tandem". letsatsi sele e nang le monyetla oa ho fana ka mokhoa o theko e tlase le o sebetsang haholoanyane oa ho sebelisa matla a Sun ho hlahisa matla a motlakase
Ho itšetleha ha rona mohloling o sa tsosoloseheng oa matla tse bitsoang libeso tse kang mashala, oli, khase li bile le phello e mpe haholo molokong oa batho le tikolohong. Ho chesoa ha libeso tsa khale ho eketsa phello ea greenhouse mme ho baka ho futhumala ha lefatše, ho senya libaka tsa bolulo, ho baka tšilafalo ea moea, metsi le mobu le ho ama bophelo bo botle ba sechaba. Ho na le tlhokahalo e potlakileng ea ho aha theknoloji e tšoarellang e ka thusang ho matla lefatše le sebelisang matla a hloekileng. Matla a letsatsi thekenoloji ke o mong oa mekhoa e joalo e nang le bokhoni ba ho sebelisa khanya ea Letsatsi - mohloli o mongata o ka nchafatsoang - le ho o fetola matla a motlakase kapa matla. Lintlha tse molemo tsa letsatsi matla mabapi le ho ruisa batho molemo le tikoloho li phethile karolo ea bohlokoa ho khothaletseng ts'ebeliso ea letsatsi matla.
Silicon ke lintho tse sebelisoang hangata ho etsa letsatsi lisele tse ka diphanele a letsatsi tse fumanehang 'marakeng kajeno. Mokhoa oa photovoltaic oa letsatsi lisele li ka fetola khanya ea letsatsi motlakase ntle le tšebeliso e eketsehileng ea mafura. Moralo le katleho ea silicon letsatsi liphanele li ntlafetse haholo lilemong tse mashome ka lebaka la tsoelo-pele ea tlhahiso le theknoloji. Matla a photovoltaic a letsatsi sele e hlalosoa e le karolo ea matla e ka sebopeho sa khanya ea letsatsi le e ka fetoloang motlakase. Katleho ea photovoltaic le litšenyehelo tse akaretsang ke lintlha tse peli tse ka sehloohong tse fokotsang letsatsi diphanele kajeno.
Ntle le silicon letsatsi lisele, tandem letsatsi Lisele li fumaneha hape moo ho sebelisoang lisele tse ikhethileng tse ntlafalitsoeng bakeng sa karolo e 'ngoe le e 'ngoe ea mahlaseli a Letsatsi ka tsela eo e lebisang ho eketseheng ha katleho ka kakaretso. Thepa e bitsoang perovskites e nkoa e le betere ho feta silicon ho monya li-photon tse putsoa tse nang le matla a phahameng ho tloha khanyeng ea letsatsi ke hore karolo e 'ngoe ea mahlaseli a Letsatsi. Perovskites ke lintho tse entsoeng ka polycrystalline (ka kakaretso methylammonium lead trihalide (CH3NH3PbX3, moo X e leng iodine, bromine kapa chlorine atom). top e ka monyang mosehla, khubelu le haufi le infrared photon hammoho le lisele tsa perovskite ka hona hoo e batlang e mena habeli tlhahiso ea matla.
Thutong e ncha e hatisitsoeng ka Science ka May 3 bafuputsi ka lekhetlo la pele ba ntlafalitse li-perovskites tandem lisele tsa letsatsi tse fanang ka bokhoni ba ho fihla ho karolo ea 25 lekholong. Boitsebiso bona bo bitsoa filimi ea lead-tin e kopantsoeng le lekhalo le tlaase la perovskite ((FASnI3) 0.6 MAPbI3) 0.4; FA bakeng sa formamidinium le MA bakeng sa methylammonium). Tin e na le bofokoli ba ho sebetsana le oksijene e tsoang moeeng e bakang likoli ka har'a kristale lattice e ka sitisang motsamao oa tjhaja ea motlakase letsatsi sele ka tsela eo e fokotsa ho sebetsa hantle ha sele. Bafuputsi ba fumane mokhoa oa ho thibela tin ho perovskite ho sebetsana le oksijene. Ba sebelisitse motsoako oa lik'hemik'hale o bitsoang guanidinium thiocyanate ho ntlafatsa haholo thepa ea sebopeho le optoelectronic ea lead-tin e tsoakiloeng ka lekhalo le tlase la lekhalo la lifilimi tsa perovskite. Motsoako oa guanidinium thiocyanate o koahela perovskite crystallites ka har'a letsatsi ho monya filimi ka tsela eo ho thibela oksijene ho kena ka hare ho sebetsana le thini. Sena hang-hang se ntlafatsa katleho ea sele ea letsatsi ho tloha ho 18 ho isa ho 20 lekholong. Hape, ha thepa ena e ncha e kopantsoe le lesela le tloaelehileng la perovskite le sebelisoang ka mokhoa o tloaelehileng, katleho e ile ea eketseha ho ea ho karolo ea 25 lekholong.
Boithuto ba hajoale bo hlalosa ka lekhetlo la pele moralo oa lisele tsa letsatsi tsa tandem tse sebelisang lifilimi tsohle tse tšesaane tsa perovskite mme theknoloji ena ka letsatsi le leng e ka nka sebaka sa silicon liseleng tsa letsatsi. Thepa e ncha ke ea boleng bo phahameng, ha e theko e tlaase 'me ho etsoa ha eona ho bonolo ha theko e tlaase ha e bapisoa le lisele tsa silicon le silicon-perovskites tandem. Li-perovskites ke lintho tse entsoeng ke motho ha li bapisoa le silicon le li-solar panels tse thehiloeng ho perovskites li fetoha habonolo, li bobebe ebile li se-transparent. Le hoja thepa ea hona joale e tla nka nako ho feta katleho ea theknoloji ea silicon-perovskite. Leha ho le joalo, lifilimi tsa polycrystalline tse thehiloeng ho perovskite li na le monyetla oa ho theha lisele tsa letsatsi tsa tandem tse ka fanang ka katleho ho fihla ho 30percent ha li ntse li boloka lintlha tse ling li sa sitisoe. Lithuto tse ling lia hlokahala ho etsa hore thepa e be matla, e tsitse le ho sebelisoa hape ho fokotsa tšusumetso tikolohong. Lekala la matla a letsatsi ke le leng la tse ntseng li hola ka potlako mme sepheo sa mantlha ke ho fumana mokhoa o ts'episang oa matla a hloekileng.
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Mohloli (s)
Tong J. et al. Nako ea bophelo ea 2019 ea Carriers ea > 1 μs ho Sn-Pb perovskites e thusa lisele tsa letsatsi tse sebetsang hantle tsa all-perovskite tandem. Saense, 364 (6439). https://doi.org/10.1126/science.aav7911
