最近,基于咔唑的自组装单层(SAM)被广泛用作倒置钙钛矿太阳能电池(PSC)中的有效空穴选择层(HSLs)。然而,由于它们的两亲性,这些SAM倾向于在溶剂中聚集,阻碍在ITO衬底上形成单层,并且阻碍钙钛矿中的深缺陷的有效钝化。在这项研究中,一系列新的SAM,包括DPA-B-PY,CBZ-B-PY,POZ-B-PY,POZ-PY,POZ-T-PY,合成POZ-BT-PY,将其用作界面修复器并涂覆在CNphSAM的顶部,以在有效的反向PSC中形成稳健的CNphSAM@伪平面单层作为HSL。CNphSAM@伪平面单层策略可实现与钙钛矿的良好对齐界面,协同促进钙钛矿晶体生长,改善电荷提取/传输,和最小化非辐射界面复合损失。因此,POZ-BT-PY改性的PSC实现了高达24.45%的惊人增强的太阳能效率以及82.63%的填充因子。此外,宽带隙PSC实现超过19%的效率。用CNphSAM@假平面单层处理后,还展示了基于PM6:BTP-eC9混合物的非富勒烯有机光伏(OPV),达到17.07%的效率。重要的是,与对照对应物相比,这些修饰的PSC和OPV在各种测试条件下都显示出显著改善的稳定性.
Lately, carbazole-based self-assembled monolayers (SAMs) are widely employed as effective hole-selective layers (HSLs) in inverted perovskite solar cells (PSCs). Nevertheless, these SAMs tend to aggregate in solvents due to their amphiphilic nature, hindering the formation of a monolayer on the ITO substrate and impeding effective passivation of deep defects in the perovskites. In this study, a series of new SAMs including DPA-B-PY, CBZ-B-PY, POZ-B-PY, POZ-PY, POZ-T-PY, and POZ-BT-PY are synthesized, which are employed as interfacial repairers and coated atop CNph SAM to form a robust CNph SAM@pseudo-planar monolayer as HSL in efficient inverted PSCs. The CNph SAM@pseudo-planar monolayer strategy enables a well-aligned interface with perovskites, synergistically promoting perovskite crystal growth, improving charge extraction/transport, and minimizing nonradiative interfacial recombination loss. As a result, the POZ-BT-PY-modified PSC realizes an impressively enhanced solar efficiency of up to 24.45% together with a fill factor of 82.63%. Furthermore, a wide bandgap PSC achieving over 19% efficiency. Upon treatment with the CNph SAM@pseudo-planar monolayer, also demonstrates a non-fullerene organic photovoltaics (OPVs) based on the PM6:BTP-eC9 blend, which achieves an efficiency of 17.07%. Importantly, these modified PSCs and OPVs all show remarkably improved stability under various testing conditions compared to their control counterparts.