In this report, the Polyaniline (PANi) nanoparticles (NPs) were synthesized by in-situ polymersation method. These PANi NPs were characterized by various standard techniques. The crystal structure study were done by Powder X-Ray diffraction (XRD) technique and confirms its amorphous structure. Scanning Electron Microscopy (SEM) images showed that this material shows micron size microfibers made up of NPs with less porosity. The Fourier Transform Infrared (FT-IR) spectroscopy confirms PANi NPs formation and dominant vibrations corresponding to its Quinone and benzene rings were very much visible in the data. From the UV-Visible spectroscopy data, the absorption data confirms the transitions related to its Quinone ring and pyran rings. The optical band gap was estimated to be around 2.47 eV and this material follows indirect allowed transition. From the Photoluminescence (PL) data, it showed various emission line in visible region after exciting it by various UV photons. PL data also confirms defects and bipolaron formation in it. The Cyclic Voltammetry (CV) of PANi was also studied and the parameters like specific capacitance (C_P), energy density (E_D),and power density (P_D) were estimated. For the current material, the value of C_P, E_D, P_D were calculated to be around 72F/g, 144 J/cm³, and 0.9 W/m³ respectively. Further the energy bands like highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of this material was determined by employing CV and the value obtained goes well as calculated by optical absorption techniques. The Electrochemical Impedance Spectroscopy (EIS) carried on PANi NPs (under different studied conditions) also reveals the formation of defects or the play of existing defects with the incident light photons. From practical application point of view, a diode like structure of this material was also fabricated. To this diode, current-voltage (I-V) and dielectrics spectroscopy measurements was carried out in dark and with photons of various wavelengths. Under different measured conditions, the I-V characteristics showed non-linear behavior. Under above experimental situations, the various parameters related with I-V characteristics were also calculated. Also this material show self-powered phenomenon, one of the essential conditions for photo detector/sensor applications. Further this device was also subjected to transient measurements. The reverse recovery time for this diode was calculated to be around 3.04 μs. The capacitance and loss studied on this device shows well dispersion with applied frequency. The observed capacitance and loss also show some changes in presence of different color of photons. The experimental data and overall properties shown by this material correlate with each other. The various properties shown by this material projects it a good candidate for future flexible optoelectronics applications.

在本报告中，聚苯胺（PANi）纳米粒子（NPs）是通过原位聚合法合成的。这些 PANi NPs 以各种标准技术为特征。通过粉末X射线衍射（XRD）技术进行晶体结构研究并确认其无定形结构。扫描电子显微镜 (SEM) 图像显示，这种材料显示出由孔隙率较小的 NP 组成的微米级微纤维。傅里叶变换红外 (FT-IR) 光谱证实了 PANi NPs 的形成和对应于其醌和苯环的主要振动在数据中非常明显。从紫外-可见光谱数据中，吸收数据证实了与其醌环和吡喃环相关的跃迁。光学带隙估计约为 2.47 eV，这种材料遵循间接允许跃迁。从光致发光（PL）数据来看，它在被各种紫外光子激发后，在可见光区显示出各种发射线。PL 数据也证实了其中的缺陷和双极化子的形成。还研究了PANi的循环伏安法（CV）和比电容（C_P )、能量密度 (E _D ) 和功率密度 (P _D ) 进行了估计。对于当前材料，C _P、E _D、P _D的值经计算约为 72F/g、144 J/cm ³和 0.9 W/m ³分别。此外，该材料的最高占据分子轨道（HOMO）和最低未占据分子轨道（LUMO）等能带是通过采用CV确定的，并且通过光学吸收技术计算得到的值很好。在 PANi NPs 上进行的电化学阻抗谱 (EIS)（在不同的研究条件下）也揭示了缺陷的形成或现有缺陷与入射光子的相互作用。从实际应用的角度来看，还制作了这种材料的二极管状结构。对于该二极管，电流-电压 (IV) 和电介质光谱测量是在黑暗中使用各种波长的光子进行的。在不同的测量条件下，IV特性表现出非线性行为。在上述实验情况下，还计算了与 IV 特性相关的各种参数。这种材料还表现出自供电现象，这是光电探测器/传感器应用的基本条件之一。此外，该设备还进行了瞬态测量。该二极管的反向恢复时间经计算约为 3.04 μs。在该器件上研究的电容和损耗显示出随应用频率的良好分散。观察到的电容和损耗也显示出不同颜色光子存在的一些变化。该材料显示的实验数据和整体性能相互关联。这种材料表现出的各种特性表明它是未来柔性光电应用的良好候选者。这种材料还表现出自供电现象，这是光电探测器/传感器应用的基本条件之一。此外，该设备还进行了瞬态测量。该二极管的反向恢复时间经计算约为 3.04 μs。在该器件上研究的电容和损耗显示出随应用频率的良好分散。观察到的电容和损耗也显示出不同颜色光子存在的一些变化。该材料显示的实验数据和整体性能相互关联。这种材料表现出的各种特性表明它是未来柔性光电应用的良好候选者。这种材料还表现出自供电现象，这是光电探测器/传感器应用的基本条件之一。此外，该设备还进行了瞬态测量。该二极管的反向恢复时间经计算约为 3.04 μs。在该器件上研究的电容和损耗显示出随应用频率的良好分散。观察到的电容和损耗也显示出不同颜色光子存在的一些变化。该材料显示的实验数据和整体性能相互关联。这种材料表现出的各种特性表明它是未来柔性光电应用的良好候选者。该二极管的反向恢复时间经计算约为 3.04 μs。在该器件上研究的电容和损耗显示出随应用频率的良好分散。观察到的电容和损耗也显示出不同颜色光子存在的一些变化。该材料显示的实验数据和整体性能相互关联。这种材料表现出的各种特性表明它是未来柔性光电应用的良好候选者。该二极管的反向恢复时间经计算约为 3.04 μs。在该器件上研究的电容和损耗显示出随应用频率的良好分散。观察到的电容和损耗也显示出不同颜色光子存在的一些变化。该材料显示的实验数据和整体性能相互关联。这种材料表现出的各种特性表明它是未来柔性光电应用的良好候选者。