Airbrush spray deposition is applied to fabricate a bilayer heterojunction solar cell based on P3HT/PCBM.This solar cell device shows an open-circuit voltage of 0.36V,a short circuit current density of 6.76mA/cm2,a co...Airbrush spray deposition is applied to fabricate a bilayer heterojunction solar cell based on P3HT/PCBM.This solar cell device shows an open-circuit voltage of 0.36V,a short circuit current density of 6.76mA/cm2,a conversion efficiency of 0.74%,and a fill factor of 30.4%.The results demonstrate that airbrush spray deposition is an effective method to fabricate multilayer or other complex polymer-based organic solar cells.Although spin-coated bulk heterojunction devices have better performance than the airbrushed ones,the airbrush is indeed feasible as a low-cost yet simple process.It is noteworthy that such preliminary results of the airbrush spray solar cell is unoptimized and thus its performance can be further improved with the development of this technology.Furthermore,this method itself has huge potential as it can be used for other polymer-based organic thin film devices.展开更多
In this paper,bulk heterojunction solar cells with poly-(3-hexylthiophene)(P3HT):[6,6]-phenyl-C61-butyric-acid-methylester(PCBM) as an active layer and modified poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(...In this paper,bulk heterojunction solar cells with poly-(3-hexylthiophene)(P3HT):[6,6]-phenyl-C61-butyric-acid-methylester(PCBM) as an active layer and modified poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) as a buffer layer are fabricated.The buffer layer is modified by adding 1% to 5% dimethyl sulfoxide(DMSO) into PEDOT:PSS solution before spin-coating.The conductivity of modified PEDOT:PSS and the performance of solar cells with modified PEDOT:PSS are measured.The highest conductivity of modified PEDOT:PSS with 4% DMSO can achieve 89.693 S/cm.The performance of organic solar cell with PEDOT:PSS modified by 4% DMSO is the best.The 4% DMSOmodified-PEDOT:PSS cell has a power conversion efficiency of 3.34%,V oc of 5.7 V,J sc of 14.56 mA/cm 2 and filling factor(FF) of 40.34%.展开更多
Two-dimensional(2D)atomically thin quantum dots(QDs)possess extraordinary electrical and optical properties.However,fabricating high quality 2D QDs via a universal and reliable technique remains a challenge.Here,we re...Two-dimensional(2D)atomically thin quantum dots(QDs)possess extraordinary electrical and optical properties.However,fabricating high quality 2D QDs via a universal and reliable technique remains a challenge.Here,we report a simple strategy to prepare high quality,monolayer single crystal 2D QDs via ultrathin cutting 2D bulk single crystals by ultramicrotome,followed by an exfoliation process.The as-prepared 2D QDs have pristine surface,high quality,high monolayer yield and high photoluminescence quantum yield(the highest photoluminescence quantum yield of WS2 is18%),which can be used as promising,low toxic,biocompatible,and good cell-permeability fluorescent labeling agents for in vitro imaging.展开更多
基金Supported by Beijing Municipal Science&Technology Commission(No Z090803044009001)the National Natural Science Foundation of China under Grant Nos 60977027 and 60825407.
文摘Airbrush spray deposition is applied to fabricate a bilayer heterojunction solar cell based on P3HT/PCBM.This solar cell device shows an open-circuit voltage of 0.36V,a short circuit current density of 6.76mA/cm2,a conversion efficiency of 0.74%,and a fill factor of 30.4%.The results demonstrate that airbrush spray deposition is an effective method to fabricate multilayer or other complex polymer-based organic solar cells.Although spin-coated bulk heterojunction devices have better performance than the airbrushed ones,the airbrush is indeed feasible as a low-cost yet simple process.It is noteworthy that such preliminary results of the airbrush spray solar cell is unoptimized and thus its performance can be further improved with the development of this technology.Furthermore,this method itself has huge potential as it can be used for other polymer-based organic thin film devices.
基金supported by the National Natural Science Foundation of China (Nos.60977027 and 60825407)the Fundamental Research Funds for the Central Universities (No.2010JBZ003)the Beijing Municipal Science & Technology Commission (No.Z090803044009001)
文摘In this paper,bulk heterojunction solar cells with poly-(3-hexylthiophene)(P3HT):[6,6]-phenyl-C61-butyric-acid-methylester(PCBM) as an active layer and modified poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) as a buffer layer are fabricated.The buffer layer is modified by adding 1% to 5% dimethyl sulfoxide(DMSO) into PEDOT:PSS solution before spin-coating.The conductivity of modified PEDOT:PSS and the performance of solar cells with modified PEDOT:PSS are measured.The highest conductivity of modified PEDOT:PSS with 4% DMSO can achieve 89.693 S/cm.The performance of organic solar cell with PEDOT:PSS modified by 4% DMSO is the best.The 4% DMSOmodified-PEDOT:PSS cell has a power conversion efficiency of 3.34%,V oc of 5.7 V,J sc of 14.56 mA/cm 2 and filling factor(FF) of 40.34%.
基金This work was supported by the National Natural Science Foundation of China(21573253)the National Key Research and Developmet Program of China(2017YFA0204700)the Strategic Priority Research Programme of the Chinese Academy of Sciences(XDB12010000).
文摘Two-dimensional(2D)atomically thin quantum dots(QDs)possess extraordinary electrical and optical properties.However,fabricating high quality 2D QDs via a universal and reliable technique remains a challenge.Here,we report a simple strategy to prepare high quality,monolayer single crystal 2D QDs via ultrathin cutting 2D bulk single crystals by ultramicrotome,followed by an exfoliation process.The as-prepared 2D QDs have pristine surface,high quality,high monolayer yield and high photoluminescence quantum yield(the highest photoluminescence quantum yield of WS2 is18%),which can be used as promising,low toxic,biocompatible,and good cell-permeability fluorescent labeling agents for in vitro imaging.
