Extremely productive p–i–n perovskite photo voltaic cells using a flat and thick CH3NH3PbI3 movie and a skinny PCBM film are fabricated by the answer-method at very low temperature. By attainment of optimized PCBM thickness and insertion from the LiF interlayer, the unit mobile exhibits 14. 知乎的这个问答挂出了好多代写骗子，有的被骗了几百，有的被骗了几千。考虑到知乎规则以及各位答主的... https://bookmarkbooth.com/story12517691/about-%E4%BB%A3%E5%86%99research-paper