Highly effective p–i–n perovskite photo voltaic cells employing a flat and thick CH3NH3PbI3 film and a skinny PCBM film are fabricated by the answer-method at very low temperature. By means of attainment of optimized PCBM thickness and insertion of the LiF interlayer, the unit mobile shows fourteen. 然后，老师会向学校报告学生情况。老师既然会去举报，一定是有实锤你代写的证据，不是他觉得... http://rowanvdfhi.bloguetechno.com/-research-paper-for-Dummies-44915450