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Development of moisture-proof polydimethylsiloxane/aluminum oxide film and stability improvement of perovskite solar cells using the film

机译:使用薄膜的膜的耐湿性聚二甲基硅氧烷/铝氧化物膜的稳定性改进

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A method for enhancing the moisture barrier property of polydimethylsiloxane (PDMS) polymer films is proposed. This is achieved by filling the PDMS free volume with aluminum oxide (AlO _( x ) ). To deposit AlO _( x ) inside PDMS, thermal atomic layer deposition (ALD) is employed. The PDMS/AlO _( x ) film thus produced has a 30 nm AlO _( x ) layer on the surface. Its water vapor transmission rate (WVTR) is 5.1 × 10 ~(?3) g m ~(?2) d ~(?1) at 45 °C and 65% relative humidity (RH). The activation energy of permeability with the PDMS/AlO _( x ) film for moisture permeation is determined to be 35.5 kJ mol ~(?1) . To investigate the moisture barrier capability of the PDMS/AlO _( x ) layer, (FAPbI _(3) ) _(0.85) (MAPbBr _(3) ) _(0.15) /spiro-OMeTAD/Au perovskite solar cells are fabricated, and encapsulated by the PDMS/AlO _( x ) film. To minimize the thermal damage to solar cells during ALD, AlO _( x ) deposition is performed at 95 °C. The solar cells exposed to 45 °C-65% RH for 300 h demonstrate less than a 5% drop in the power-conversion efficiency.
机译:提出了一种增强聚二甲基硅氧烷(PDMS)聚合物膜的水分阻隔性的方法。这是通过用氧化铝(ALO _(X))填充PDMS自由体积来实现的。为了在PDMS内沉积ALO _(X),采用热原子层沉积(ALD)。如此制备的PDMS / ALO _(X)膜在表面上具有30nm AlO _(X)层。其水蒸气透射率(WVTR)在45℃和65%相对湿度(RH)下为5.1×10〜(α3)G m〜(α2)d〜(α1)。用PDMS / AlO _(X)膜的渗透性的渗透能量的活性能量测定为35.5kJ mol〜(α1)。为了研究PDMS / ALO _(X)层的水分阻隔能力,(FAPBI _(3))_(0.85)(MAPBBR _(3))_(0.15)/ SITO-OMETAD / AU PEROVSKITE太阳能电池,并由PDMS / ALO _(X)膜封装。为了在ALD期间最小化对太阳能电池的热损伤,在95℃下进行AlO _(X)沉积。暴露于45℃-65%RH的太阳能电池300小时,功率转换效率下降小于5%。

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