Patent ID: 11929443
Assignee: nan
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 0:
1. A luminescent solar concentrator (LSC) device, comprising:
a lower band-gap energy bottom LSC layer; and a
higher band-gap energy top LSC layer positioned above the lower band-gap energy bottom LSC layer, wherein
the higher band-gap energy top LSC layer has a higher band-gap energy than the lower band-gap energy bottom LSC layer, and
the higher band-gap energy top LSC layer has a higher internal quantum efficiency (IQE) than the lower band-gap energy bottom LSC layer;
wherein the higher band-gap energy top LSC layer, the lower band-gap energy bottom LSC layer, or both, comprise quantum dots (QDs);
wherein the higher band-gap energy top LSC layer comprises one or more of the following: wide band-gap nanocrystals (NCs) selected from a group consisting of II-VI, III-V, I-III-VI2 semiconductors, all-inorganic perovskites and organic-inorganic hybrid perovskites comprising alloyed compounds prepared as spherical quantum dots (QDs), nanorods, nanoplatelets, tetrapods and combinations thereof;
heterostructured nanocrystals selected from a group consisting of I-VI, III-V, I-III-VI2 semiconductors, their alloys and combinations thereof, prepared as core/shell NCs, selected from heteronanorods, hetero-nanoplatelets, and/or hetero-tetrapods; and/or
NCs doped with emissive impurities;
wherein the higher band-gap energy top LSC layer comprises a group consisting of core/shell CdSe/CdS quantum dots (QDs), nanorods, and/or nanoplatelets, core/shell CdxZn1-xSeyS1-y/ZnSezS1-z QDs, InP QDs, core/shell InP/ZnS QDs, Mn-doped CdxZn1-xSeyS1-y QDs, Mn-doped core/shell CdxZn1-xSeyS1-y/ZnSezS1-z QDs, Cu-doped CdxZn1-xSeyS1-y QDs, Cu-doped core/shell CdxZn1-xSeyS1-y/ZnSezS1-z QDs, or any combination thereof;
wherein the lower band-gap energy bottom LSC layer comprises nanocrystals of narrow band-gap semiconductors comprising CdTe, PbSe, PbS, PbSexS1-x, CuInS2, a CuInS2—ZnS alloy, CuInSe2, a CuInSe2—ZnS alloy, CuInSexS2-x, a CuInSe2—ZnSeS alloy, AgInS2, AgInSe2, AgInSexS2, Si, Ge, a SiGe alloy, and/or GaAs, any combination thereof, or heterostructures based on a combination of any of the previous materials with one or more wider band-gap materials comprising core/shell selected from the group consisting of PbSe/Cd Se QDs, PbS/CdS QDs, CuInS2/ZnS QDs, CuInSe2/ZnSe QDs, and/or CuInSe2/ZnSe/ZnS QDs;
said bottom LSC layer comprising strong absorbance across the solar spectrum; said top LSC layer virtually reabsorption free and both layers exhibit high emission quantum yield (QY).