Fig 1D data.

The output signals in natural dyes-based solar cells (DSSC) can be either rising or decaying depending on the type of ions present in the system; these ions called added ions, are introduced by the additives: mordant and brighteners. The photon-dye interaction produces electrons, which eventually reach the electrode giving place to a superficially charged electrode in contact with an electrolyte where are the added ions. This combination produces, automatically, an electrical double-layer EDL structure which has important effects on the performance of the system: a) the added ions control, to a large extent, the initial shape of the output signal, giving rise to rising or decaying profiles; b) it is possible to store large amounts of energy and charge at high electric fields. This structure is found in many other systems that have a surface charged in contact with an electrolyte like piezoelectric materials in human body. This assertion was supported by determining important parameters such as the force between charged surfaces on both sides of the interface, the charge density, the energy density, and the capacitance. The Debye length has very small values then, many important quantities depend on this; it is possible to obtain large values for energy UDL ~ 3.6x105 Jm-3 and charge density ρDL ≈ 1.1x107 Cm-3 for double layer capacitors; these values are orders of magnitude larger than the corresponding values for electrostatic capacitors: Uelec ≈ 4.5x10-3 Jm-3 and ρelec ≈ 1.2 Cm-3. A non-linear model was also developed to fit unstable oscillations found in the output profiles produced by abrupt lighting.天然染料基太阳能电池（DSSC）的输出信号可呈上升或衰减态势，具体取决于体系中存在的离子类型；这类离子被称为外加离子，由媒染剂与增亮剂两类添加剂引入。光子与染料的相互作用会产生电子，这些电子最终抵达电极，使与电解质接触的电极表面带电，而电解质中含有外加离子。这种组合会自发形成双电层（EDL）结构，该结构对体系性能具有重要影响：a) 外加离子在很大程度上控制输出信号的初始形态，使其呈现上升或衰减型剖面；b) 可在强电场下储存大量能量与电荷。该结构也存在于诸多其他体系中，例如与电解质接触的表面带电体系，如人体中的压电材料。通过测定界面两侧带电表面间的作用力、电荷密度、能量密度与电容等关键参数，验证了这一论断。德拜长度的数值极小，因此诸多关键物理量均依赖于此参数；对于双电层电容器，可获得高达UDL ~ 3.6×10^5 J·m^-3的能量密度以及ρDL ≈ 1.1×10^7 C·m^-3的电荷密度，这些数值比静电电容器的对应数值高出数个数量级：静电电容器的Uelec ≈ 4.5×10^-3 J·m^-3，ρelec ≈ 1.2 C·m^-3。此外，还开发了一种非线性模型，用于拟合突发光照下输出信号剖面中出现的不稳定振荡现象。