采用基于传输矩阵法的光学模型及Matlab软件，模拟了以聚合物P3HTPCBM为活性层的倒装太阳能电池，并分析了模拟电池的吸光率及其内部光电场分布。探讨了厚度、入射角度以及新结构对电池光学性能的影响。模拟结果表明，电池的光吸收主要由活性层厚度决定，分别随着电子传输层和空穴传输层厚度的增加而下降。当光入射角度增大时，由于光程的增加电池的吸光率随之增加，在40°入射角时达到最大；由于其他光学作用，器件吸光率在40°入射角以后反而降低；证明了光斜入射时电场在整个器件中分布是不连续的。通过在基本结构的适当位置插入一层薄膜构成的微腔器件,由于光学共振效应能够有效提高电池的光吸收。

Optical simulations based on transfer matrix method, combined with Matlab have been performed to investigate optical properties of inverted polymer solar cell (IPSC). Effects of thickness, angle of incidence and structure on optical performance of IPSC are studied theoretically. Simulations reveal that optical absorption is mainly dependent on active thickness and has faint decrease as thickness of electron transport layer and hole transport layer increase, respectively. Path length of light inside a solar cell increases so that more light is absorbed. The absorption rate reachs its maximum under the angle of 40°. However, as with other optical effects the absorption rate reduced with the increase of angle, when the angles above 40°; Furthermore, simulations demonstrate optical electric field for p-polarized light is discontinuous at boundaries. A microcavity device which has been constructed by a dioxide (TiO2) layer into the basic structure can significantly enhance light absorption due to the optical resonance effect.