Compared to traditional electrochromic technology, photovoltaic electrochromic (PV-EC) module can achieve color change in electrochromic layers without additional power source. In this work, an innovative printable PV-EC module is provided. The device includes a plurality of planarly distributed silicon thin film solar cells (Si-TFSCs) configured in superstrate structure, covered with a layer of polyelectrolyte based electrochromic thin film (ECTF). The Si-TFSC consists of one anode (with a portion of area exposed from the Si-TFSC), a photoelectric conversion layer, and one cathode. The ECTF is prepared from nano-size polyelectrolyte based electrochromic material, which is composed of polyaniline (PAN!) and polyanion poly (sodium 4-styrenesulfonate) (PSS) nanospheres mixture. When the printable PV-EC module is irradiated by sunlight, the PANI/PSS ECTF on the surface of the transparent anode layer exhibits anodic color changing, and transforms from pale green (emeraldine salt state) to light blue (emeraldine blue state). (C) 2015 Elsevier B.V. All rights reserved.