Retraction notice to “Enhance the stability and efficiency of perovskite solar cell via gel-type polyurethane”: [Polymer (2016) (97) 196–204](S0032386116304281)(10.1016/j.polymer.2016.05.039)

Chuang, P.-Y.P.-Y.ChuangChuang, C.-N.C.-N.ChuangYu, C.-C.C.-C.YuWang, L.-Y.L.-Y.WangHsieh, K.-H.K.-H.Hsieh2020-06-232020-06-23201700323861https://scholars.lib.ntu.edu.tw/handle/123456789/504319[SDGs]SDG7Retraction notice to “Enhance the stability and efficiency of perovskite solar cell via gel-type polyurethane”: [Polymer (2016) (97) 196–204](S0032386116304281)(10.1016/j.polymer.2016.05.039)other10.1016/j.polymer.2017.05.009