Byeong Jo Kim, Dong Hoe Kim, Yoo-Yong Lee, Hee-Won Shin, Gill Sang Han, Jung Sug Hong, Khalid Mahmood, Tae Kyu Ahn, Young-Chang Joo, Kug Sun Hong, Nam-Gyu Park, Sangwook Lee, and Hyun Suk Jun, “Highly Efficient and Bending Durable Perovskite Solar Cells: Toward Wearable Power Source”, Energy & Environmental Science 8, 2014 DOI: 10.1039/C4EE02441A