The efficiency limit of CH3NH3PbI3 perovskite solar cells

With the consideration of photon recycling effect, the efficiency limit of methylammonium lead iodide (CH3NH3PbI3) perovskite solar cells is predicted by a detailed balance model. To obtain convincing predictions, both AM 1.5 spectrum of Sun and experimentally measured complex refractive index of perovskite material are employed in the detailed balance model. The roles of light trapping and angular restriction in improving the maximal output power of thin-film perovskite solar cells are also clarified. The efficiency limit of perovskite cells (without the angular restriction) is about 31%, which approaches to Shockley-Queisser limit (33%) achievable by gallium arsenide (GaAs) cells. Moreover, the…

• NN
  National Natural Science Foundation of China

  Award: 61201122
• RG
  Research Grants Council, University Grants Committee

  Awards: 201311159056, N_HKU709/12, HKU711612E, C7045-14E, SEG HKU09, HKU711813