Optical Modeling and Analysis of Organic Solar Cells with Coherent Multilayers and Incoherent Glass Substrate Using Generalized Transfer Matrix Method

Abstract

We present optical modeling and physical analysis results of thin-film organic solar cells (OSCs) based on a generalized transfer matrix method, which can calculate, with a simple matrix form, the mixed coherent and incoherent interaction of an incoherent glass substrate with other coherent layers. The spatial distribution of the electric field intensity, power density, and power dissipation are calculated in both coherent and incoherent layers with respect to the optical spacer thickness. By decomposing the power density and power dissipation into forward-propagating, backward-propagating, and their interference components, we demonstrate that the dependence of the spacer thickness on the total device reflectance plays an important role in determining the light absorption efficiency of the OSC.

Boundary condition model for the simulation of organic solar cells

“…Thus, the exciton can be seen as a non-electromagnetic carrier with energy hc/λ in the organic material. The propagation and absorption of photons in the layers of OSC is usually calculated by the so-called Transfer Matrix Method (TMM) [8,13,33,34]. In TMM, the photon energy and propagation are represented by the electric field wave of the photon electromagnetic wave.…”

“…For accurate prediction of OSCs performance, the main physical-chemical mechanisms: light propagation in the materials, creation and dissociation of excitons into electrical charges, and drift-diffusion transport of the charge carriers, must be incorporated into the numerical simulator. Previously, in several excellent works, the understanding of each mechanism and to interactions between different mechanisms was considered [5][6][7][8][9][10][11][12][13]. The backbone of these models is the set of transport equations: the continuity, Poisson and drift-diffusion current equations (see equations (4)-(12) later).…”

Effect of Sunlight Polarization on the Absorption Efficiency of V-shaped Organic Solar Cells

“…For planar OSCs, the transfer matrix method (TMM) described by 2×2 matrices has been widely used to calculate the absorption behavior for both s-and p-polarized light [13][14][15][16][17][18][19][20]. However, this method is not applicable to nonplanar structures such as textured gratings and folded structures.…”

Optical optimization of organic solar cell with bulk heterojunction

“…The presented paper invol− ves the optical analysis of solar cell structures. Light absorp− tion in the photocell is a crucial process and it is the most frequently investigated problem with the use of numerical methods [12][13][14][15][16]. In effect of optical analysis, we can deter− mine optimal thicknesses of constituent photocell layers and define the upper limit of the obtainable photocurrent.…”

“…The location of nodes and antinode of the stationary wave depends on refractive indexes and thick− ness of particular layers. Optical optimization of a solar cell consists in finding such thickness values of component lay− ers for which light intensity within the area of active layer is maximum [12][13][14][15][16]. Optical substrate is an integral element of each photocell upon which particular solar cell layers are deposited.…”