@article{201911.0075,
	doi = {10.20944/preprints201911.0075.v1},
	url = {https://doi.org/10.20944/preprints201911.0075.v1},
	year = 2019,
	month = {November},
	publisher = {Preprints},
	author = {Quanbin Liang and Guoping Luo and Xiaoping Cheng and Hongbin Wu},
	title = {Highly Efficient, ITO-Free Polymer Solar Cells Using Ultrathin Copper Film as Transparent Electrode},
	journal = {Preprints}
}