The past 5 years have witnessed the rapid development of organic solar cells based on nonfullerene acceptors(NFAs)[1-26].The state-of-the-art NFA-based single-junction and tandem solar cells afforded 18.22%(certified ...The past 5 years have witnessed the rapid development of organic solar cells based on nonfullerene acceptors(NFAs)[1-26].The state-of-the-art NFA-based single-junction and tandem solar cells afforded 18.22%(certified 17.6%)and 17.36%(certified 17.29%)power conversion efficiencies(PCEs),respectively[27,28].Wide-bandgap(WBG)polymer donors are ideal partners for NFAs.They present complementary absorption with that of low-bandgap NFAs and deep the highest occupied molecular orbital(HOMO)levels.Therefore,solar cells based on a WBG polymer and a NFA can generate high short-circuit current density(Jsc)and open-circuit voltage(Voc)[29].Meanwhile,some WBG polymers show high crystallinity and mobility,gifting the solar cells high fill factors(FF)[30].Recently,our group first reported efficient WBG D-A copolymer donors based on fused-ring aromatic lactone(FRAL)acceptor units.展开更多
The power conversion efficiency for single-junction solar cells is limited by the Shockley-Quiesser limit.An effective approach to realize high efficiency is to develop multi-junction cells.These years have witnessed ...The power conversion efficiency for single-junction solar cells is limited by the Shockley-Quiesser limit.An effective approach to realize high efficiency is to develop multi-junction cells.These years have witnessed the rapid development of organic–inorganic perovskite solar cells.The excellent optoelectronic properties and tunable bandgaps of perovskite materials make them potential candidates for developing tandem solar cells,by combining with silicon,Cu(In,Ga)Se_(2)and organic solar cells.In this review,we present the recent progress of perovskite-based tandem solar cells,including perovskite/silicon,perovskite/perovskite,perovskite/Cu(In,Ga)Se_(2),and perovskite/organic cells.Finally,the challenges and opportunities for perovskite-based tandem solar cells are discussed.展开更多
In recent years,all-inorganic perovskite solar cells(PSCs)have attracted tremendous interest due to their excellent thermal stability[1-3].Unlike organic-inorganic halide perovskites,whose organic component is volatil...In recent years,all-inorganic perovskite solar cells(PSCs)have attracted tremendous interest due to their excellent thermal stability[1-3].Unlike organic-inorganic halide perovskites,whose organic component is volatile at temperatures higher than 2000C,all-inorganic perovskites can tolerate temperatures over 400℃without deterioration[4].However,the power conversion efficiency(PCE)for all-inorganic PSCs is much lower than that of organic-inorganic halide PSCs mainly due to its wider bandgap,which leads to limited light absorption and low short-circuit current density(Jsc).At present,the most studied all-inorganic perovskites are CsPbI3 and CsPbI2Br.Partly replacing I with Br can decrease the preparation temperature,but the bandgap will increase[5,6].To improve the performance of inorganic PSCs,many researches focused on crystallinity control and interfacial engineering[7-10].Few works were done to broaden the photoresponse to improve Jsc,thus improving the PCE.Developing tandem or integrated solar cells is an effective approach to make full use of sunlight[11,12].For tandem solar cells,the preparation process is very complicated.展开更多
基金Supported by the National Science Foundation of China grant(21875067,51811530011)the Fundamental Research Funds for the Central Universities,Shanghai Rising-Star(19QA1403100)。
基金the National Key Research and Development Program of China (2017YFA0206600)the National Natural Science Foundation of China (51773045, 21772030, 51922032 and 21961160720)+1 种基金Fundamental Research Funds for the Central Universities (2020CDJQY-A055)the Youth Association for Promoting Innovation (CAS) for financial support。
基金the National Key Research and Development Program of China(2017YFA0206600)the National Natural Science Foundation of China(51773045,21772030,51922032 and 21961160720)the Youth Association for Promoting Innovation(CAS)for financial support。
文摘The past 5 years have witnessed the rapid development of organic solar cells based on nonfullerene acceptors(NFAs)[1-26].The state-of-the-art NFA-based single-junction and tandem solar cells afforded 18.22%(certified 17.6%)and 17.36%(certified 17.29%)power conversion efficiencies(PCEs),respectively[27,28].Wide-bandgap(WBG)polymer donors are ideal partners for NFAs.They present complementary absorption with that of low-bandgap NFAs and deep the highest occupied molecular orbital(HOMO)levels.Therefore,solar cells based on a WBG polymer and a NFA can generate high short-circuit current density(Jsc)and open-circuit voltage(Voc)[29].Meanwhile,some WBG polymers show high crystallinity and mobility,gifting the solar cells high fill factors(FF)[30].Recently,our group first reported efficient WBG D-A copolymer donors based on fused-ring aromatic lactone(FRAL)acceptor units.
基金the National Natural Science Foundation of China(51773045,21772030,51922032,and 21961160720)for financial support。
文摘The power conversion efficiency for single-junction solar cells is limited by the Shockley-Quiesser limit.An effective approach to realize high efficiency is to develop multi-junction cells.These years have witnessed the rapid development of organic–inorganic perovskite solar cells.The excellent optoelectronic properties and tunable bandgaps of perovskite materials make them potential candidates for developing tandem solar cells,by combining with silicon,Cu(In,Ga)Se_(2)and organic solar cells.In this review,we present the recent progress of perovskite-based tandem solar cells,including perovskite/silicon,perovskite/perovskite,perovskite/Cu(In,Ga)Se_(2),and perovskite/organic cells.Finally,the challenges and opportunities for perovskite-based tandem solar cells are discussed.
基金the National Key Research and Development Program of China(2017YFA0206600)the National Natural Science Foundation of China(51773045,21772030,51922032 and 21961160720)。
文摘In recent years,all-inorganic perovskite solar cells(PSCs)have attracted tremendous interest due to their excellent thermal stability[1-3].Unlike organic-inorganic halide perovskites,whose organic component is volatile at temperatures higher than 2000C,all-inorganic perovskites can tolerate temperatures over 400℃without deterioration[4].However,the power conversion efficiency(PCE)for all-inorganic PSCs is much lower than that of organic-inorganic halide PSCs mainly due to its wider bandgap,which leads to limited light absorption and low short-circuit current density(Jsc).At present,the most studied all-inorganic perovskites are CsPbI3 and CsPbI2Br.Partly replacing I with Br can decrease the preparation temperature,but the bandgap will increase[5,6].To improve the performance of inorganic PSCs,many researches focused on crystallinity control and interfacial engineering[7-10].Few works were done to broaden the photoresponse to improve Jsc,thus improving the PCE.Developing tandem or integrated solar cells is an effective approach to make full use of sunlight[11,12].For tandem solar cells,the preparation process is very complicated.
