[1] E H Jung, N J Jeon, E Y Park et al. Efficient, stable and scalable perovskite solar cells using poly (3-hexylthiophene). Nature, 567, 511(2019).
[2] D Luo, W Yang, Z Wang et al. Enhanced photovoltage for inverted planar heterojunction perovskite solar cells. Science, 360, 1442(2018).
[3] H Tan, A Jain, O Voznyy et al. Efficient and stable solution-processed planar perovskite solar cells via contact passivation. Science, 355, 722(2017).
[4] H Tsai, W Nie, J C Blancon et al. High-efficiency two-dimensional Ruddlesden –Popper perovskite solar cells. Nature, 536, 312(2016).
[5] W S Yang, J H Noh, N J Jeon et al. High-performance photovoltaic perovskite layers fabricated through intramolecular exchange. Science, 348, 1234(2015).
[6] P Zhu, S Gu, X Luo et al. Simultaneous contact and grain-boundary passivation in planar perovskite solar cells using SnO2-KCl composite electron transport layer. Adv Energy Mater, 10, 1903083(2020).
[7] Y Zhao, H Tan, H Yuan et al. Perovskite seeding growth of formamidinium-lead-iodide-based perovskites for efficient and stable solar cells. Nat Commun, 9, 1607(2018).
[8] Q Han, Y Wei, R Lin et al. Low-temperature processed inorganic hole transport layer for efficient and stable mixed Pb –Sn low-bandgap perovskite solar cells. Sci Bull, 64, 1399(2019).
[9] A Kojima, K Teshima, Y Shirai et al. Organometal halide perovskites as visible-light sensitizers for photovoltaic cells. J Am Chem Soc, 131, 6050(2009).
[10]
[11] M A Green, E D Dunlop, D H Levi et al. Solar cell efficiency tables (version 54). Prog Photovolt Res Appl, 27, 565(2019).
[12] W Shockley, H J Queisser. Detailed balance limit of efficiency of p–n junction solar cells. J Appl Phys, 32, 510(1961).
[13] J F Geisz, M A Steiner, N Jain et al. Building a six-junction inverted metamorphic concentrator solar cell. IEEE J Photovolt, 8, 626(2017).
[14] F Meillaud, A Shah, C Droz et al. Efficiency limits for single-junction and tandem solar cells. Sol Energy Mater Sol Cells, 90, 2952(2006).
[15] M A Contreras, L M Mansfield, B Egaas et al. Wide bandgap Cu(In, Ga)Se2 solar cells with improved energy conversion efficiency. Prog Photovolt Res Appl, 20, 843(2012).
[16] L Meng, Y Zhang, X Wan et al. Organic and solution-processed tandem solar cells with 17.3% efficiency. Science, 361, 1094(2018).
[17] X Che, Y Li, Y Qu et al. High fabrication yield organic tandem photovoltaics combining vacuum- and solution-processed subcells with 15% efficiency. Nat Energy, 3, 422(2018).
[18] P Cheng, G Li, X Zhan et al. Next-generation organic photovoltaics based on non-fullerene acceptors. Nat Photonics, 12, 131(2018).
[19] J Yuan, Y Zhang, L Zhou et al. Single-junction organic solar cell with over 15% efficiency using fused-ring acceptor with electron-deficient core. Joule, 3, 1140(2019).
[20] M Anaya, G Lozano, M E Calvo et al. ABX3 perovskites for tandem solar cells. Joule, 1, 769(2017).
[21] R E Beal, D J Slotcavage, T Leijtens et al. Cesium lead halide perovskites with improved stability for tandem solar cells. J Phys Chem Lett, 7, 746(2016).
[22] Y Yu, C Wang, C R Grice et al. Synergistic effects of lead thiocyanate additive and solvent annealing on the performance of wide-bandgap perovskite solar cells. ACS Energy Lett, 2, 1177(2017).
[23] T Leijtens, K A Bush, R Prasanna et al. Opportunities and challenges for tandem solar cells using metal halide perovskite semiconductors. Nat Energy, 3, 828(2018).
[24] G E Eperon, S D Stranks, C Menelaou et al. Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells. Energy Environ Sci, 7, 982(2014).
[25] G Xu, P Bi, S Wang et al. Integrating ultrathin bulk-heterojunction organic semiconductor intermediary for high-performance low-bandgap perovskite solar cells with low energy loss. Adv Funct Mater, 28, 1804427(2018).
[26] M Wei, K Xiao, G Walters et al. Combining efficiency and stability in mixed tin–lead perovskite solar cells by capping grains with an ultrathin 2D layer. Adv Mater, 1907058(2020).
[27] C Li, Z Song, D Zhao et al. Reducing saturation-current density to realize high-efficiency low-bandgap mixed tin–lead halide perovskite solar cells. Adv Energy Mater, 9, 1803135(2019).
[28] X Liu, Z Yang, C C Chueh et al. Improved efficiency and stability of Pb–Sn binary perovskite solar cells by Cs substitution. J Mater Chem A, 4, 17939(2016).
[29] Z Yang, A Rajagopal, C C Chueh et al. Stable low-bandgap Pb–Sn binary perovskites for tandem solar cells. Adv Mater, 28, 8990(2016).
[30] B Zhao, M Abdi-Jalebi, M Tabachnyk et al. High open-circuit voltages in tin-rich low-bandgap perovskite-based planar heterojunction photovoltaics. Adv Mater, 29, 1604744(2017).
[31] H L Zhu, W C H Choy. Crystallization, properties, and challenges of low-bandgap Sn–Pb binary perovskites. Sol RRL, 2, 1800146(2018).
[32] K A Bush, A F Palmstrom, J Y Zhengshan et al. 23.6%-efficient monolithic perovskite/silicon tandem solar cells with improved stability. Nat Energy, 2, 17009(2017).
[33] J Werner, L Barraud, A Walter et al. Efficient near-infrared-transparent perovskite solar cells enabling direct comparison of 4-terminal and monolithic perovskite/silicon tandem cells. ACS Energy Lett, 1, 474(2016).
[34] B Chen, J Y Zhengshan, S Manzoor et al. Blade-coated perovskites on textured silicon for 26%-efficient monolithic perovskite/silicon tandem solar cells. Joule, 4, 850(2020).
[35] J Werner, C H Weng, A Walter et al. Efficient monolithic perovskite/silicon tandem solar cell with cell area > 1 cm 2. J Phys Chem Lett, 7, 161(2016).
[36] T Duong, Y Wu, H Shen et al. Rubidium multication perovskite with optimized bandgap for perovskite-silicon tandem with over 26% efficiency. Adv Energy Mater, 7, 1700228(2017).
[37] S Pisoni, F Fu, T Feurer et al. Flexible NIR-transparent perovskite solar cells for all-thin-film tandem photovoltaic devices. J Mater Chem A, 5, 13639(2017).
[38] H Shen, J Peng, D Jacobs et al. Mechanically-stacked perovskite/CIGS tandem solar cells with efficiency of 23.9% and reduced oxygen sensitivity. Energy Environ Sci, 11, 394(2018).
[39] T Todorov, T Gershon, O Gunawan et al. Perovskite-kesterite monolithic tandem solar cells with high open-circuit voltage. Appl Phys Lett, 105, 173902(2014).
[40] Q Han, Y T Hsieh, L Meng et al. High-performance perovskite/Cu(In, Ga)Se2 monolithic tandem solar cells. Science, 361, 904(2018).
[41] F Fu, T Feurer, T P Weiss et al. High-efficiency inverted semi-transparent planar perovskite solar cells in substrate configuration. Nat Energy, 2, 1690(2016).
[42] C D Bailie, M G Christoforo, J P Mailoa et al. Semi-transparent perovskite solar cells for tandems with silicon and CIGS. Energy Environ Sci, 8, 956(2015).
[43] Q Zeng, L Liu, Z Xiao et al. A two-terminal all-inorganic perovskite/organic tandem solar cell. Sci Bull, 64, 885(2019).
[44] U Saha, M K Alam. Proposition and computational analysis of a kesterite/kesterite tandem solar cell with enhanced efficiency. RSC Adv, 7, 4806(2017).
[45] Y Li, H Hu, B Chen et al. Solution-processed perovskite-kesterite reflective tandem solar cells. Sol Energy, 155, 35(2017).
[46] H Lee, C Lee. Analysis of ion-diffusion-induced interface degradation in inverted perovskite solar cells via restoration of the Ag electrode. Adv Energy Mater, 8, 1702197(2018).
[47] K Tanabe. A Review of ultrahigh efficiency III–V semiconductor compound solar cells: multijunction tandem, lower dimensional, photonic up/down conversion and plasmonic nanometallic structures. Energies, 2, 504(2009).
[48] T Ameri, N Li, C J Brabec. Highly efficient organic tandem solar cells: a follow up review. Energy Environ Sci, 6, 2390(2013).
[49] Z J Yu, M Leilaeioun, Z Holman. Selecting tandem partners for silicon solar cells. Nat Energy, 1, 16137(2016).
[50] I Celik, A B Philips, Z Song et al. Energy payback time (EPBT) and energy return on energy invested (eroi) of perovskite tandem photovoltaic solar cells. IEEE J Photovoltaics, 8, 305(2017).
[51] J Y Zhengshan, J V Carpenter, Z C Holman. Techno-economic viability of silicon-based tandem photovoltaic modules in the United States. Nat Energy, 3, 747(2018).
[52] J H Heo, S H Im. CH3NH3PbBr3–CH3NH3PbI3 perovskite–perovskite tandem solar cells with exceeding 2.2 V open circuit voltage. Adv Mater, 28, 5121(2016).
[53] G E Eperon, T Leijtens, K A Bush et al. Perovskite-perovskite tandem photovoltaics with optimized band gaps. Science, 354, 861(2016).
[54] R Lin, K Xiao, Z Qin et al. Monolithic all-perovskite tandem solar cells with 24.8% efficiency exploiting comproportionation to suppress Sn (II) oxidation in precursor ink. Nat Energy, 4, 864(2019).
[55] J Werner, B Niesen, C Ballif. Perovskite/silicon tandem solar cells: Marriage of convenience or true love story? – An overview. Adv Mater Interfaces, 5, 1700731(2018).
[56] G E Eperon, M T Hörantner, H J Snaith. Metal halide perovskite tandem and multiple-junction photovoltaics. Nat Rev Chem, 1, 0095(2017).
[57] G L Araújo, A Martí. Absolute limiting efficiencies for photovoltaic energy conversion. Sol Energy Mater Sol Cells, 33, 213(1994).
[58] M T Hörantner, T Leijtens, M E Ziffer et al. The potential of multijunction perovskite solar cells. ACS Energy Lett, 2, 2506(2017).
[59] E L Unger, L Kegelmann, K Suchan et al. Roadmap and roadblocks for the band gap tunability of metal halide perovskites. J Mater Chem A, 5, 11401(2017).
[60] J H Noh, S H Im, J H Heo et al. Chemical management for colorful, efficient, and stable inorganic–organic hybrid nanostructured solar cells. Nano Lett, 13, 1764(2013).
[61] W Chen, J Zhang, G Xu et al. A semitransparent inorganic perovskite film for overcoming ultraviolet light instability of organic solar cells and achieving 14.03% efficiency. Adv Mater, 30, 1800855(2018).
[62] W Chen, H Chen, G Xu et al. Precise control of crystal growth for highly efficient CsPbI2Br perovskite solar cells. Joule, 3, 191(2019).
[63] A F Palmstrom, G E Eperon, T Leijtens et al. Enabling flexible all-perovskite tandem solar cells. Joule, 3, 2193(2019).
[64] M Saliba, T Matsui, K Domanski et al. Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance. Science, 354, 206(2016).
[65] Y H Park, I Jeong, S Bae et al. Inorganic rubidium cation as an enhancer for photovoltaic performance and moisture stability of HC(NH2)2PbI3 perovskite solar cells. Adv Funct Mater, 27, 1605988(2017).
[66] P Yadav, M I Dar, N Arora et al. The role of rubidium in multiple-cation-based high-efficiency perovskite solar cells. Adv Mater, 29, 1701077(2017).
[67] M Zhang, J S Yun, Q Ma et al. High-efficiency rubidium-incorporated perovskite solar cells by gas quenching. ACS Energy Lett, 2, 438(2017).
[68] W Liao, D Zhao, Y Yu et al. Fabrication of efficient low-bandgap perovskite solar cells by combining formamidinium tin iodide with methylammonium lead iodide. J Am Chem Soc, 138, 12360(2016).
[69] J Im, C C Stoumpos, H Jin et al. Antagonism between spin-orbit coupling and steric effects causes anomalous band gap evolution in the perovskite photovoltaic materials CH3NH3Sn1–
[70] R Prasanna, A Gold-Parker, T Leijtens et al. Band gap tuning via lattice contraction and octahedral tilting in perovskite materials for photovoltaics. J Am Chem Soc, 139, 11117(2017).
[71] Z Yang, C C Chueh, P W Liang et al. Effects of formamidinium and bromide ion substitution in methylammonium lead triiodide toward high-performance perovskite solar cells. Nano Energy, 22, 328(2016).
[72] D Forgács, L Gil-Escrig, D Pérez-Del-Rey et al. Efficient monolithic perovskite/perovskite tandem solar cells. Adv Energy Mater, 7, 1602121(2017).
[73] A Rajagopal, Z Yang, S B Jo et al. Highly efficient perovskite–perovskite tandem solar cells reaching 80% of the theoretical limit in photovoltage. Adv Mater, 29, 1702140(2017).
[74] F Jiang, T Liu, B Luo et al. A two-terminal perovskite/perovskite tandem solar cell. J Mater Chem A, 4, 1208(2016).
[75] T Leijtens, R Prasanna, K A Bush et al. Tin–lead halide perovskites with improved thermal and air stability for efficient all-perovskite tandem solar cells. Sustain Energy Fuels, 2, 2450(2018).
[76] D Zhao, C Chen, C Wang et al. Efficient two-terminal all-perovskite tandem solar cells enabled by high-quality low-bandgap absorber layers. Nat Energy, 3, 1093(2018).
[77] J Tong, Z Song, D H Kim et al. Carrier lifetimes of > 1
[78] R Prasanna, T Leijtens, S P Dunfield et al. Design of low bandgap tin–lead halide perovskite solar cells to achieve thermal, atmospheric and operational stability. Nat Energy, 4, 939(2019).
[79] R Sheng, M T Hörantner, Z Wang et al. Monolithic wide band gap perovskite/perovskite tandem solar cells with organic recombination layers. J Phys Chem C, 121, 27256(2017).
[80] J Ávila, C Momblona, P Boix et al. High voltage vacuum-deposited CH3NH3Pb3–CH3NH3PbI3 tandem solar cells. Energy Environ Sci, 11, 3292(2018).
[81] Y Yan. All-perovskite tandem solar cell showing unprecedentedly high open-circuit voltage. Joule, 2, 2206(2018).
[82] D Zhao, C Wang, Z Song et al. Four-terminal all-perovskite tandem solar cells achieving power conversion efficiencies exceeding 23%. ACS Energy Lett, 3, 305(2018).
[83] B Abdollahi, I M Hossain, M Jakoby et al. Vacuum-assisted growth of low-bandgap thin films (FA0.8MA0.2Sn0.5Pb0.5I3) for all-perovskite tandem solar cells. Adv Energy Mater, 10, 1902583(2020).
[84] I L Braly, R J Stoddard, A Rajagopal et al. Current-induced phase segregation in mixed halide hybrid perovskites and its impact on two-terminal tandem solar cell design. ACS Energy Lett, 2, 1841(2017).
[85] R J Stoddard, A Rajagopal, R L Palmer et al. Enhancing defect tolerance and phase stability of high-bandgap perovskites via guanidinium alloying. ACS Energy Lett, 3, 1261(2018).
[86] B Saparov, D B Mitzi. Organic–inorganic perovskites: structural versatility for functional materials design. Chem Rev, 116, 4558(2016).
[87] D Zhao, Y Yu, C Wang et al. Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells. Nat Energy, 2, 17018(2017).
[88] F Hao, C C Stoumpos, P Guo et al. Solvent-mediated crystallization of CH3NH3SnI3 films for heterojunction depleted perovskite solar cells. J Am Chem Soc, 137, 11445(2015).
[89] Y Zhou, M Yang, W Wu et al. Room-temperature crystallization of hybrid-perovskite thin films via solvent–solvent extraction for high-performance solar cells. J Mater Chem A, 3, 8178(2015).
[90] Z Yang, Z Yu, H Wei et al. Enhancing electron diffusion length in narrow-bandgap perovskites for efficient monolithic perovskite tandem solar cells. Nat Commun, 10, 4498(2019).
