| 主权项 |
1. A method of manufacturing a solar cell, comprising:
providing m parts by mole of M1X12 by a first deposition source, providing 1-m parts by mole of M2X22 by a second deposition source, and providing a fixed amount of a fixed amount of AX1tX2(1−t) by a third deposition source to deposit a first conversion layer on a first electrode, wherein the first conversion layer is a composition-gradient perovskite; and forming a second electrode on the first conversion layer, wherein a part of the first conversion layer adjacent to the first electrode has an energy gap lower than that of a part of the first conversion layer adjacent to the second electrode, wherein the first conversion layer has a composition of M1mM2(1−m)AX1(2m+t)X2(3−2m−t), m is decreased with a longer deposition time, t is decreased with a longer deposition time, 1≧m≧0, and 1≧t≧0;
wherein each of M1 and M2 is independently a divalent cation of Ge, Sn, or Pb,wherein A is a monovalent cation of methylammonium, ethylammonium, or formamidinium,wherein each of X1 and X2 is independently a monovalent anion of halogen,wherein M1 has a lower atomic number than M2, X1 has a higher atomic number than X2, or a combination thereof. |
