Supporting Information For s1

Supporting Information for

ITO-free Photovoltaic Cell Utilizing a High-resolution

Silver Grid Current Collecting Layer

Yaowen Lia,c, Lin Maoa, Yulong Gaob,Pan Zhangc,Chao Lic, Changqi Mab, Yingfeng Tuc,Zheng Cuib, Liw

ei Chen* a

ai-LAB, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, S uzhou, 215123, P. R China. bDivision of Printed Electronics, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO),Chinese

Academy of Sciences, Suzhou, 215123, P. R China. cJiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Poly mer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soo chow University, Suzhou, 215123, P. R. China.

*Corresponding author ：E-mail address: [email protected]

Tel.: +8651262872655;

Fax: +8651262872655.

1 Fig. S1 Transmission electron micrograph of the active layer based on the PET/Ag-grid:PH1000/PH100

0 electrode. The sample was prepared by soaking the device (with P3HT:PCBB-C8 (w/w, 1:1)) in a mixture of water and tetrahydrofuran and the active layer was then peeled off and transferred onto TEM grid.