Abstract: An organic solar cell includes a first sub-cell including a first active layer and a second sub-cell including a second active layer, wherein at least one of the first active layer and the second active layer includes at least two types of electron acceptors having different light absorbance from each other.

Abstract: A solar cell includes a first electrode, a second electrode facing the first electrode, a photoactive layer between the first electrode and the second electrode and including an electron donor and an electron acceptor, and a partially oxidized metal thin film between the first electrode and the photoactive layer.

Abstract: An electron-donating polymer may include a repeating unit A including a repeating unit according to Chemical Formula 3 and at least one selected from a repeating unit according to Chemical Formula 1, a repeating unit according to Chemical Formula 2, and a combination thereof, and a repeating unit B including a repeating unit according to Chemical Formula 4 and a repeating unit according to Chemical Formula 5.

Abstract: According to example embodiments, an electron-donating polymer includes a repeating unit A including one repeating unit selected from a repeating unit represented by Chemical Formula 1, a repeating unit represented by Chemical Formula 2, and a combination thereof. The polymer also includes a repeating unit B represented by Chemical Formula 3.

Abstract: An organic solar cell including a cathode and an anode, a photoactive layer disposed between the cathode and the anode, and a buffer layer between the photoactive layer and the cathode, wherein the cathode includes a compound represented by the following Chemical Formula 1 Zn(1-x)MxO(1-y)Wy,??[Chemical Formula 1] and the buffer layer includes ZnO, and wherein in Chemical Formula 1, M is aluminum, gallium, indium, silicon, germanium, titanium, zirconium, hafnium, or a combination thereof, W is fluorine, bromine, or a combination thereof, and x and y are each independently greater than or equal to 0 and less than or equal to 0.1, provided that x and y are not simultaneously 0.

Abstract: A polymer, and an organic solar cell including the polymer, include a repeating unit A represented by Chemical Formula 1, and a repeating unit B represented by Chemical Formula 2.

Abstract: According to example embodiments, a hybrid metal oxide having a network structure includes an oxygen atom that is covalently bonded to a first metal and a second metal. At least one of the first metal and the second metal has two or more oxidation states. A solar cell may have an interlayer including the hybrid metal oxide. According to example embodiments, a hybrid metal oxide may be formed using a sol-gel process from a solution including a first metal precursor and a second metal precursor.

Abstract: A polymer, and an organic solar cell including the polymer, include a repeating unit A represented by Chemical Formula 1, and a repeating unit B represented by Chemical Formula 2.

Abstract: An electron-donating polymer including a repeating unit A with a repeating unit represented by Chemical Formula 1 and at least one of repeating units represented by Chemical Formulae 2-4.

Abstract: An electron donating polymer including moiety A represented by Chemical Formula 1, and a solar cell including the electron donating polymer are provided. In Chemical Formula 1, X1 is a functional group including at least two ester residual groups and a substituted or unsubstituted divalent aliphatic organic group linking the ester residual groups, and X2 is one of hydrogen, a halogen atom, a substituted or unsubstituted C1 to C20 aliphatic group, a hydroxy group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C30 ketone group, a substituted or unsubstituted C1 to C20 ester group, a thiol group, —SR100 (wherein R100 is one of a substituted or unsubstituted C1 to C20 aliphatic group, a substituted or unsubstituted C2 to C30 aromatic group, and a substituted or unsubstituted C2 to C30 heterocycloalkyl group), and a combination thereof.

Abstract: An organic solar cell includes a first sub-cell including a first active layer and a second sub-cell including a second active layer, wherein at least one of the first active layer and the second active layer includes at least two types of electron acceptors having different light absorbance from each other.

Abstract: A solar cell includes a first electrode, a second electrode facing the first electrode, a photoactive layer between the first electrode and the second electrode and including an electron donor and an electron acceptor, and a partially oxidized metal thin film between the first electrode and the photoactive layer.

Abstract: According to example embodiments, a hybrid metal oxide having a network structure includes an oxygen atom that is covalently bonded to a first metal and a second metal. At least one of the first metal and the second metal has two or more oxidation states. A solar cell may have an interlayer including the hybrid metal oxide. According to example embodiments, a hybrid metal oxide may be formed using a sol-gel process from a solution including a first metal precursor and a second metal precursor.

Abstract: A polymer, and an organic solar cell including the polymer, include a repeating unit A represented by Chemical Formula 1, and a repeating unit B represented by Chemical Formula 2.

Abstract: According to example embodiments, an organic solar cell includes a first electrode, a second electrode on the first electrode, and a photoactive layer between the first electrode and the second electrode. The photoactive layer includes a photoactive material and an ultraviolet (UV) absorber. The ultraviolet (UV) absorber may be represented by Chemical Formula 1, disclosed herein.

Abstract: A polymer including moiety A represented by Chemical Formula 1, and a solar cell including the polymer are provided.

Abstract: An electron-donating polymer may include a repeating unit A including a repeating unit according to Chemical Formula 3 and at least one selected from a repeating unit according to Chemical Formula 1, a repeating unit according to Chemical Formula 2, and a combination thereof, and a repeating unit B including a repeating unit according to Chemical Formula 4 and a repeating unit according to Chemical Formula 5.

Abstract: A layered structure including graphene, wherein a basal plane of the graphene is a (0001) plane; and a layer including an organic material having a conjugated system disposed on the graphene, wherein the layer comprising the organic material layer having the conjugated system is bound to the (0001) plane of the graphene by a ?-? interaction, and a method of preparing the same.

Abstract: Disclosed is an electron-donating polymer including a repeating unit A including one repeating unit selected from a repeating unit represented by Chemical Formula 1, a repeating unit represented by Chemical Formula 2, and a combination thereof; and a repeating unit B represented by Chemical Formula 3.

Abstract: An electron-donating polymer including a repeating unit A with a repeating unit represented by Chemical Formula 1 and at least one of repeating units represented by Chemical Formulae 2-4.