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首页> 外文期刊>ACS applied materials & interfaces >Enhanced Efficiency and Long-Term Stability of Perovskite Solar Cells by Synergistic Effect of Nonhygroscopic Doping in Conjugated Polymer-Based Hole-Transporting Layer
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Enhanced Efficiency and Long-Term Stability of Perovskite Solar Cells by Synergistic Effect of Nonhygroscopic Doping in Conjugated Polymer-Based Hole-Transporting Layer

机译：通过在共轭聚合物基空穴输送层中的非特性掺杂的协同作用，增强钙钛矿太阳能电池的效率和长期稳定性

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摘要

A face-on oriented and p-doped semicrystalline conjugated polymer, poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c] [1,2,5]-thiadiazole) (PPDT2FBT), was studied as a hole transport layer (HTL) in methylammonium lead triioclidebased perovskite solar cells (PVSCs). PPDT2FBT exhibits a mid-band gap (1.7 eV), high vertical hole mobility (7.3 X 10(-3) cm(2)/V-s), and well-aligned frontier energy levels with a perovskite layer for efficient charge transfer/transport, showing a maximum power conversion efficiency (PCE) of 16.8%. Upon doping the PPDT2FBT HTL with a nonhygroscopic Lewis acid, tris(pentafluorophenyl)borane (BCF, 2-6 wt %), the vertical conductivity was improved by a factor of approximately 2, and the resulting PCE was further improved up to 17.7%, which is higher than that of standard PVSCs with 2,2',7,7'-tetralds(N,N-di-p-methoxyphenylamine)-9,9'-spirobilluorene (spiroOMeTAD) as an HTL. After BCF doping, the clearly enhanced carrier diffusion coefficient, diffusion length, and lifetime were measured using intensity-modulated photocurrent and photovoltage spectroscopy. Furthermore, compared to the standard PVSCs with spiro-OMeTAD, the temporal device stability was remarkably improved, preserving the similar to 60% of the original PCE for SOO h without encapsulation under light-soaking condition (1 sun AM 1.5G) at 85 degrees C and 85% humidity, which is mainly due to the highly crystalline conjugated backbone of PPDT2FBT and nonhygroscopic nature of BCF. In addition, formamidinium lead iodide/bromide (FAPbI(3-x)Br(x))-based PVSCs with the BCF-doped PPDT2FBT as an HTL was also prepared to show 18.8% PCE, suggesting a wide applicability of PPDT2FBT HTL for different types of PVSCs.,
机译：面向上定向和p掺杂的半晶缀合聚合物，聚[（2,5-双（2-己二烯）苯基苯基） - （5,6-二氟-4,7-di（噻吩-2-基）苯并[c] [1,2,5] - 硫唑）（PPDT2FBT）被研究作为甲基烷基铅三椰子基氏植物钙钛矿太阳能电池（PVSCs）的空穴传输层（HTL）。 PPDT2FBT展示中带隙（1.7eV），高垂直空穴迁移率（7.3×10（-3）厘米（2）/ vs），以及具有钙钛矿层的良好对准的前沿能量水平，用于高效电荷转移/运输，显示最大功率转换效率（PCE）为16.8％。在用非吸入式路易斯酸的PPDT2FBT HTL掺杂，TRIS（五氟苯基）硼烷（BCF，2-6wt％），垂直导电率提高了约2的因子，得到的PCE进一步提高了17.7％，其高于标准PVSC的标准PVSC，具有2,2'，7,7'-Tetrals（N，N-Di-P-甲氧基甲氧基胺）-9,9'-螺呋喃（Spioometad）作为HTL。在BCF掺杂之后，使用强度调制的光电流和光电光谱测量明显增强的载体扩散系数，扩散长度和寿命。此外，与用螺欧比达的标准PVSC相比，时间器件稳定性显着提高，保持了与85度的光浸型条件（1 SUN 1.5G）下封装的原始PCE相似的60％ C和85％的湿度，主要是由于PPDT2FBT的高晶缀合骨架和BCF​​的非从上学性质。此外，还制备了具有BCF掺杂PPDT2FBT作为HTL的基于甲酰胺铅碘化物/溴（Fapbi（3-X）Br（X））的PVSC，以显示18.8％的PCE，表明PPDT2FBT HTL的宽采适用于不同PVSC的类型。，

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