调节双（4-甲氧基苯基）胺基空穴传输材料中的π桥联单元以改善钙钛矿太阳能电池性能的策略<a href="#fn1" title="可用电子补充信息（ESI）：空穴传输的理论细节，表S1-S5和图S1-S4。参见DOI：10.1039 / c8tc01891j">†</a>,Journal of Materials Chemistry C

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调节双（4-甲氧基苯基）胺基空穴传输材料中的π桥联单元以改善钙钛矿太阳能电池性能的策略 †
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-06-07 00:00:00 , DOI: 10.1039/c8tc01891j
Hongyuan Liu _{1,

2,

3,

4,

5} , Xiaorui Liu _{1,

2,

3,

4,

5}

Affiliation

我们提出了一种有效的策略来调节双（4-甲氧基苯基）胺基空穴传输材料（HTMs）中的π桥联单元的电子缺陷，以提高空穴迁移率和钙钛矿太阳能电池（PSC）器件的性能。为了证实这一策略，我们在报道的基于双（4-甲氧基苯基）胺的pDPA-DBTP的基础上，调整了pDPA-DBTP中π桥单元的电子缺陷，并设计了一系列新的HTM（S1-S3）。与母体分子pDPA-DBTP相比，设计好的HTM S1-S3表现出更好的性能，斯托克斯位移大，激子结合能小，稳定性更好，溶解度更高和空穴迁移率更高。分子（S1-S3）的空穴迁移率值为1.07×10 ^-2分别为1.47×10 ^-2和1.60×10 ^-1 cm ² V ^-1 s ^-1。这些结果提供了有用的信息，并证明调节基于双（4-甲氧基苯基）胺的HTM中π桥单元的电子缺陷是控制性能的有效方法，以改善PSC应用中HTM的性能。此外，设计的S1-S3 HTM可以作为有前途的候选者，以在PSC应用中提供高效率。

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Strategy to modulate the π-bridged units in bis(4-methoxyphenyl)amine-based hole-transporting materials for improvement of perovskite solar cell performance†

We present an effective strategy to modulate the electron-deficiency of the π-bridged units in bis(4-methoxyphenyl)amine-based hole-transporting materials (HTMs) for improving hole mobility and the performances of perovskite solar cells (PSC) devices. In order to confirm this strategy, on the basis of the reported bis(4-methoxyphenyl)amine-based pDPA-DBTP, we adjusted the electron-deficiency of π-bridge units in pDPA-DBTP, and designed a series of new HTMs (S1–S3). Compared with the parent molecule pDPA-DBTP, the as-designed HTMs S1–S3 exhibit better performance with large Stokes shifts, small exciton binding energy, better stability, good solubility and higher hole mobility. The values of hole mobility for the molecules (S1–S3) are 1.07 × 10⁻², 1.47 × 10⁻² and 1.60 × 10⁻¹ cm² V⁻¹ s⁻¹, respectively. These results provide useful information and demonstrate that adjusting the electron-deficiency of π-bridge units in bis(4-methoxyphenyl)amine-based HTMs is an efficient approach to control the properties for improving the performance of HTMs in PSC applications. Moreover, the designed S1–S3 HTMs can act as promising candidates for providing high efficiency in PSC applications.

更新日期：2018-06-07

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