基于氧化石墨烯空穴传输层的钙钛矿太阳能电池
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摘要
采用溶液旋涂法在平面异质结型钙钛矿电池中引入氧化石墨烯(Graphene oxide,GO),制备了GO、GO∶(PEDOT:PSS)复合薄膜和GO/PEDOT∶PSS双层薄膜作为空穴传输层的电池,其光电转换效率分别为1.86%、7.35%、7.69%,基于PEDOT∶PSS空穴传输层的对照电池的效率为7.38%.主要原因是GO具有绝缘性,作为阳极界面层时,随着GO薄膜厚度增加,器件的串联电阻增大,从而降低了电池的短路电流和效率.为提高GO导电性,并改善其功函数,将GO氨化改性后与PEDOT:PSS组合构成双空穴传输层,所得电池取得了7.69%的较高效率,表明该方式是GO用于钙钛矿电池空穴传输层的有效途径.
Graphene Oxide(GO)was introduced as a hole transport layer material in a planar heterojunction perovskite battery by solution spin coating.The photoelectric conversion efficiencies of the prepared cells based on GO,GO∶(PEDOT:PSS)composite film and GO/PEDOT∶PSS double-layer film as hole transport layer are 1.86%,7.35%,and 7.69%,respectively.And the efficiency of the control cell based on PEDOT∶PSS as the transport layer is 7.38%.The main reason is that graphene oxide has insulation properties.When graphene oxide as the anode interface layer,the series resistance of the device increases with the thickness of the graphene oxide film increases,thereby reducing the shortcircuit current and efficiency of the battery.In order to improve the conductivity of graphene oxide and its work function,the oxidation of graphene oxide was combined with PEDOT:PSS to form a two-hole transport layer.The battery achieves a high efficiency of 7.69%,which proves that this is oxidation is an effective way for graphene to be used in the hole transport layer of perovskite cells.
Graphene Oxide(GO)was introduced as a hole transport layer material in a planar heterojunction perovskite battery by solution spin coating.The photoelectric conversion efficiencies of the prepared cells based on GO,GO∶(PEDOT:PSS)composite film and GO/PEDOT∶PSS double-layer film as hole transport layer are 1.86%,7.35%,and 7.69%,respectively.And the efficiency of the control cell based on PEDOT∶PSS as the transport layer is 7.38%.The main reason is that graphene oxide has insulation properties.When graphene oxide as the anode interface layer,the series resistance of the device increases with the thickness of the graphene oxide film increases,thereby reducing the shortcircuit current and efficiency of the battery.In order to improve the conductivity of graphene oxide and its work function,the oxidation of graphene oxide was combined with PEDOT:PSS to form a two-hole transport layer.The battery achieves a high efficiency of 7.69%,which proves that this is oxidation is an effective way for graphene to be used in the hole transport layer of perovskite cells.
引文
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[3]HOU Y,DU X,SCHEINER S,et al.A generic interface to reduce the efficiency-stability-cost gap of perovskite solar cells[J].Science,2017,358(6367):1192-1197.
[4]SHI Jiang-jian,LI Yi-ming.From ultrafast to ultraslow:charge-carrier dynamics of perovskite solar cells[J].Joule,2018,2(5):879-901.
[5]ACIK M,DARLINGS B.Graphene in perovskite solar cells:device design,characterization and implementation[J].Journal of Materials Chemistry A,2016,4(17):6185-6186
[6]YANG Z,XIE J,ARIVAZHAGAN V,et al.Efficient and highly light stable planar perovskite solar cells with graphene quantum dots doped PCBM electron transport layer[J].Nano Energy,2017,40:345-351.
[7]NIE Wan-yi,TSAI H.High-efficiency solution-processed perovskite solar cells with millimeter-scale grains[J].Science,2015,347(6221):522-525.
[8]YANG P,HU Z,ZHAO P,et al.Cesium-containing perovskite solar cell based on graphene/TiO2electron transport layer[J].Chemistryselect,2017,2(29):9433-9437.
[9]LI Shao-sian,TU Kun-hua,LIN Chi-cheng,et al.Solution-processable graphene oxide as an efficient hole transport layer in polymer solar cells[J].ACS Nano,2010,4(6):3169-3174.
[10]LI Dan,CUI Jin,LI Hao,et al.Graphene oxide modified hole transport layer for CH3NH3PbI3planar heterojunction solar cells[J].Solar Energy,2016,131:176-182.
[11]WANG D H,KIM J K,et al.Transferable graphene oxide by stamping nanotechnology:electron-transport layer for efficient bulk-heterojunction solar cells.Angew[J].Chemie International Edition,2013,52:2874-288.
[12]LIU T,KIM D,HAN H,et al.Fine-tuning optical and electronic properties of graphene oxide for highly efficient perovskite solar cells[J].Nanoscale,2015,7(24):10708-1071.
[13]YEOJ S,KANG R,LEE S,et al.Highly efficient and stable planar perovskite solar cells with reduced graphene oxide nanosheets as electrode interlayer[J].Nano Energy,2015,12:96-104.
[14]ANTONELLA G,SOFIA M,SILVIA C,et al.UV reduced graphene oxide pedot:pss nanocomposite for perovskite solar cells[C].IEEE Transactions on Nanotechnology,2016,15:725-730.
[15]SAQIB R,SHAHINO A,MUHAMMAD S,et al.Significantly improved photovoltaic performance in polymer bulk heterojunction solar cells with graphene oxide/PEDOT∶PSS double decked hole transport layer[J].Scientific Reports,2017,7:39555.
[16]WANG Yi-shan,WANG Hao-wei,XU Jun-feng,et al.PEDOT∶PSS modification by blending graphene oxide to improve the efficiency of organic solar cells[J].Polymer Composites,2018,39(9):3066-3072.
[17]AGNIESZKA A,FELIPE B,MICHAL F,et al.Electrochemical and photocurrent characterization of polymer solar cells with improved performance after GO addition to the PEDOT:PSS hole transporting layer[J].Solar Energy,2017,146:230-242.
[18]LI D,CUI J,LI H,et al.Graphene oxide modified hole transport layer for CH3NH3PbI3planar heterojunction solar cells[J].Solar Energy,2016,131:176-182.
[19]LEE D Y,NA S,KIM S S.Graphene oxide/PEDOT:PSS composite hole transport layer for efficient and stable planar heterojunction perovskite solar cells[J].Nanoscale,2016,8(3):1513-1522.
[20]HUANG X,GUO H,YANGJ,et al.Moderately reduced graphene oxide/PEDOT∶PSS as hole transport layer to fabricate efficient perovskite hybrid solar cells[J].Organic Electronics,2016,39:288-295.
[21]FENG Shang-lei,YANG Ying-guo,LI Meng,et al.High-Performance perovskite solar cells engineered by an ammonia modified graphene oxide interfacial layer[J].ACS Applied Materials&Interfaces,2016,8:14503-14512.