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首页> 外文期刊>Advanced Functional Materials >Charge Generation and Photovoltaic Operation of Solid-State Dye-Sensitized Solar Cells Incorporating a High Extinction Coefficient Indolene-Based Sensitizer
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Charge Generation and Photovoltaic Operation of Solid-State Dye-Sensitized Solar Cells Incorporating a High Extinction Coefficient Indolene-Based Sensitizer

机译：固态染料敏化太阳能电池的电荷产生和光伏操作，并结合了消光系数高的基于吲哚的高敏化剂

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摘要

An investigation of the function of an indolene-based organic dye, termed D149, incorporated in to solid-state dye-sensitized solar cells using 2,2',7,7'-tetrakis(N,N-di-p-methoxypheny-amine)-9,9'-spirobifluorene (spiro-OMeTAD) as the hole transport material is reported. Solar cell performance characteristics are unprecedented under low light levels, with the solar cells delivering up to 70% incident photon-to-current efficiency (IPCE) and over 6% power conversion efficiency, as measured under simulated air mass (AM) 1.5 sun light at 1 and 10 mW cm~(-2). However, a considerable nonlinearity in the photocurrent as intensities approach "full sun" conditions is observed and the devices deliver up to 4.2% power conversion efficiency under simulated sun light of 100mW cm~(-2). The influence of dye-loading upon solar cell operation is investigated and the thin films are probed via photoinduced absorption (PIA) spectroscopy, time-correlated single-photon counting (TCSPC), and photoluminescence quantum efficiency (PLQE) measurements in order to deduce the cause for the non ideal solar cell performance. The data suggest that electron transfer from the photoexcited sensitizer into the TiO_2 is only between 10 to 50% efficient and that ionization of the photo excited dye via hole transfer directly to spiro-OMeTAD dominates the charge generation process. A persistent dye bleaching signal is also observed, and assigned to a remarkably high density of electrons "trapped" within the dye phase, equivalent to 1.8 × 10~(17)cm~(-3) under full sun illumination, it is believed that this localized space charge build-up upon the sensitizer is responsible for the non-linearity of photocurrent with intensity and nonoptimum solar cell performance under full sun conditions.
机译：使用2,2'，7,7'-四（N，N-二-对甲氧基苯基-）将吲哚基有机染料D149掺入固态染料敏化太阳能电池中的功能研究胺）-9,9'-螺双芴（spiro-OMeTAD）被报道为空穴传输材料。太阳能电池在低光照条件下的性能特征是空前的，在模拟空气质量（AM）1.5太阳光下，太阳能电池可提供高达70％的入射光子电流效率（IPCE）和超过6％的功率转换效率在1和10 mW cm〜（-2）然而，随着强度接近“全日照”条件，光电流中存在相当大的非线性，并且在模拟的100mW cm〜（-2）的日光下，器件的功率转换效率高达4.2％。研究了染料负载对太阳能电池运行的影响，并通过光致吸收（PIA）光谱，时间相关的单光子计数（TCSPC）和光致发光量子效率（PLQE）测量来探测薄膜，从而推断出导致太阳能电池性能不理想。数据表明，电子从光激发敏化剂转移到TiO_2的效率仅为10％至5​​0％，并且光致敏染料通过空穴转移直接转移到spiro-OMeTAD的电离作用占了电荷产生过程的大部分。还观察到持久的染料漂白信号，并且该信号分配给染料相中“捕获”的电子密度非常高，相当于在完全阳光照射下为1.8×10〜（17）cm〜（-3）。在敏化剂上积累的这种局部空间电荷导致光电流在强度和全日照条件下的非线性以及非最佳太阳能电池性能方面具有非线性。

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  • 来源
    《Advanced Functional Materials》 |2009年第11期|1810-1818|共9页
  • 作者

    Henry J. Snaith; Annamaria Petrozza; Seigo Ito; Hidetoshi Miura; Michael Graetzel;

  • 作者单位

    Department of Physics, Clarendon Laboratory, University of Oxford Parks Road, Oxford, OX13PU (UK);

    Department of Physics, Cavendish Laboratory University of Cambridge J. J. Thompson Avenue, Cambridge, CB3 OHE (UK);

    Institut des Sciences et Ingenierie Chimiques, Ecole Polytechnique Federale de Lausanne 1015 Lausanne (Switzerland);

    Chemicrea Inc., Tsukuba Center 2-1-6 Sengen, Tsukuba, Ibaraki 305-0047 (Japan);

    Institut des Sciences et Ingenierie Chimiques, Ecole Polytechnique Federale de Lausanne 1015 Lausanne (Switzerland);

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