Relaxed Current Matching Requirements in Highly Luminescent Perovskite Tandem Solar Cells and Their Fundamental Efficiency Limits.
Relaxed Current Matching Requirements in Highly Luminescent Perovskite Tandem Solar Cells and Their Fundamental Efficiency Limits.
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DOI：
10.1021/acsenergylett.0c02481
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发表时间：
2021-02-12
影响因子：
22
通讯作者：
Stranks SD
中科院分区：
文献类型：
--
作者：
Bowman AR;Lang F;Chiang YH;Jiménez-Solano A;Frohna K;Eperon GE;Ruggeri E;Abdi-Jalebi M;Anaya M;Lotsch BV;Stranks SD
基于钙钛矿的叠层太阳能电池随着其接近商业化而越来越受到关注。在这里，我们使用光谱测量的实验参数来计算钙钛矿-硅和全钙钛矿双端串联的限制效率，采用目前可用的带隙材料，分别为42.0%和40.8%。我们显示子电池之间的发光耦合（光子从高带隙到低带隙子电池的光学转移）在高带隙子电池是发光钙钛矿时松弛电流匹配。我们计算出，发光耦合变得重要的电荷捕获率（≤106 s-1）已经在相关的卤化物钙钛矿实现。发光耦合增加了子电池厚度的灵活性和对不同光谱条件的耐受性。为了最大的益处，高带隙子电池在平均光谱条件下应具有较高的短路电流。这可以通过减小高带隙子电池的带隙来实现，从而允许避免更宽的、不稳定的带隙组成。最后，我们通过横截面发光成像来可视化全钙钛矿串联中的发光耦合。
Perovskite-based tandem solar cells are of increasing interest as they approach commercialization. Here we use experimental parameters from optical spectroscopy measurements to calculate the limiting efficiency of perovskite–silicon and all-perovskite two-terminal tandems, employing currently available bandgap materials, as 42.0% and 40.8%, respectively. We show luminescence coupling between subcells (the optical transfer of photons from the high-bandgap to low-bandgap subcell) relaxes current matching when the high-bandgap subcell is a luminescent perovskite. We calculate that luminescence coupling becomes important at charge trapping rates (≤106 s–1) already being achieved in relevant halide perovskites. Luminescence coupling increases flexibility in subcell thicknesses and tolerance to different spectral conditions. For maximal benefit, the high-bandgap subcell should have the higher short-circuit current under average spectral conditions. This can be achieved by reducing the bandgap of the high-bandgap subcell, allowing wider, unstable bandgap compositions to be avoided. Lastly, we visualize luminescence coupling in an all-perovskite tandem through cross-section luminescence imaging.
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影响因子：
5.7
作者：
Pazos-Outon, Luis M.;Xiao, T. Patrick;Yablonovitch, Eli
通讯作者：
Yablonovitch, Eli
DOI：
10.1039/c6ta04840d
发表时间：
2016-08-07
期刊：
Journal of materials chemistry. A
影响因子：
--
作者：
Anaya M;Correa-Baena JP;Lozano G;Saliba M;Anguita P;Roose B;Abate A;Steiner U;Grätzel M;Calvo ME;Hagfeldt A;Míguez H
通讯作者：
Míguez H
影响因子：
6.9
作者：
Lan, Dongchen;Geisz, John E.;Green, Martin A.
通讯作者：
Green, Martin A.
影响因子：
15
作者：
Prasanna, Rohit;Gold-Parker, Aryeh;McGehee, Michael D.
通讯作者：
McGehee, Michael D.
影响因子：
6.9
作者：
Marti, A;Araujo, GL
通讯作者：
Araujo, GL