Vijayakanth Thangavel, Srivastava Anant Kumar, Ram Farsa, Kulkarni Priyangi, Shanmuganathan Kadhiravan, Praveenkumar Balu, Boomishankar Ramamoorthy
Department of Chemistry, Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha Road, Pune, 411008, India.
Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.
Angew Chem Int Ed Engl. 2018 Jul 16;57(29):9054-9058. doi: 10.1002/anie.201805479. Epub 2018 Jun 19.
A new binary organic salt diphenyl diisopropylamino phosphonium hexaflurophosphate (DPDP⋅PF ) was shown to exhibit a good ferroelectric response and employed for mechanical energy harvesting application. The phosphonium salt crystallizes in the monoclinic noncentrosymmetric space group Cc and exhibits an H-bonded 1D chain structure due to N-H⋅⋅⋅F interactions. Ferroelectric measurements on the single crystals of DPDP⋅PF gave a well-saturated rectangular hysteresis loop with a remnant (P ) polarization value of 6 μC cm . Further, composite devices based on polydimethylsiloxane (PDMS) films for various weight percentages (3, 5, 7, 10 and 20 wt %) of DPDP⋅PF were prepared and examined for power generation by using an impact test setup. A maximum output peak-to-peak voltage (V ) of 8.5 V and an output peak-to-peak current (I ) of 0.5 μA was obtained for the non-poled composite film with 10 wt % of DPDP⋅PF . These results show the efficacy of organic ferroelectric substances as potential micropower generators.
一种新型二元有机盐二苯基二异丙基氨基鏻六氟磷酸盐（DPDP⋅PF₆）被证明具有良好的铁电响应，并被用于机械能收集应用。该鏻盐结晶于单斜非中心对称空间群Cc中，由于N-H⋅⋅⋅F相互作用而呈现出氢键连接的一维链状结构。对DPDP⋅PF₆单晶的铁电测量得到了一个饱和良好的矩形磁滞回线，剩余极化强度（Pr）值为6 μC cm⁻²。此外，制备了基于聚二甲基硅氧烷（PDMS）薄膜且含有不同重量百分比（3、5、7、10和20 wt%）DPDP⋅PF₆的复合器件，并使用冲击测试装置对其发电性能进行了检测。对于含有10 wt% DPDP⋅PF₆的未极化复合薄膜，获得了最大输出峰峰值电压（Vpp）为8.5 V，输出峰峰值电流（Ipp）为0.5 μA。这些结果表明有机铁电物质作为潜在的微功率发电机的有效性。
