Dopant-Free Hole Transporting Material Based on Nonconjugated Adamantane for High-Performance Perovskite Solar Cells.
Dopant-Free Hole Transporting Material Based on Nonconjugated Adamantane for High-Performance Perovskite Solar Cells.
复制标题
用于高性能钙钛矿太阳能电池的基于非共轭金刚烷的无掺杂空穴传输材料。
DOI：
10.3389/fchem.2021.746365
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发表时间：
2021
影响因子：
5.5
通讯作者：
Huang W
中科院分区：
文献类型：
--
作者：
Fan D;Zhang R;Li Y;Shan C;Li W;Wang Y;Xu F;Fan H;Sun Z;Li X;Zhao M;Kyaw AKK;Li G;Wang J;Huang W
合成了一种新的无掺杂空穴传输材料（HTM） 4′，4′，4′，4′′，4′‘’‘’-（金刚烷-1,3,5,7-四基）四基（N，N-双（4-甲氧基苯基）-[1,1′-联苯]-4-胺）（Ad- ph - ometad）（简称FDY），该材料由非共轭三维大体积笼形金刚烷（Ad）为核心，三苯基胺为侧臂，苯基单元为连接桥组成，并应用于倒平面钙钛矿太阳能电池（PSC）中。结果表明，在标准AM 1.5G照明下，FDY作为HTM的champion器件的转换效率（PCE）为18.69%,JSC = 22.42 mA cm−2,VOC = 1.05 V, FF = 79.31%，比基于PEDOT:PSS的器件（仅为15.41%）高出约20%。值得注意的是，基于FDY的PSC的稳定性远远好于基于PEDOT:PSS的器件，相应的器件在没有任何封装的情况下，在氮气手套箱中储存60天后，其初始pce保留了90%以上。即使在相对湿度为50-60%的露天条件下储存188 h，保留的PCE仍超过初始值的81%。这些结果表明，以体积庞大的非共轭（脂肪族）金刚烷为核心，以三苯胺为侧臂的设计策略，不同于传统的基于共轭骨架的设计方法，可以有效地开发出高效的聚能干细胞用HTMs，为科学家设计聚能干细胞用小分子HTMs开辟了新的途径。
A new dopant-free hole transporting material (HTM) 4′,4‴,4‴'',4‴''''-(adamantane-1,3,5,7-tetrayl)tetrakis(N,N-bis(4-methoxyphenyl)-[1,1′-biphenyl]-4-amine) (Ad-Ph-OMeTAD) (named FDY for short), which consists of a nonconjugated 3D bulky caged adamantane (Ad) as the core, triphenyl amines as side arms, and phenyl units as a linking bridge, is synthesized and applied in an inverted planar perovskite solar cell (PSC). As a result, the champion device with FDY as HTM yields an impressive power of conversion efficiency (PCE) of 18.69%, with JSC = 22.42 mA cm−2, VOC = 1.05 V, and FF = 79.31% under standard AM 1.5G illumination, which is ca. 20% higher than that of the device based on PEDOT:PSS (only 15.41%). Notably, the stability of PSC based on FDY is much better than that of devices based on PEDOT:PSS, and the corresponding devices retain over 90% of their initial PCEs after storing for 60 days in a nitrogen glove box without any encapsulation. Even when stored in an open air condition with 50–60% relative humidity for 188 h, the retained PCE is still over 81% of its initial one. All these results demonstrate that the new design strategy by combing the bulky and nonconjugated (aliphatic) adamantane unit as the core and triphenyl amines as side arms can efficiently develop highly efficient HTMs for PSCs, which is different from the traditional way based on conjugated backbones, and it may open a new way for scientists to design small-molecule HTMs for PSCs.