It is well known that [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) is a common n-type passivation material in PSCs, usually used as an interface modification layer. However, PCBM is extremely expensive and is not suitable for future industrialization. Herein, the various concentrations of PCBM as an additive are adopted for PSCs. It not only avoids the routine process of spin coating the multi-layer films, but also reduces the PCBM material and cost. Meanwhile, PCBM can passivate the grain surface and modulate morphology of perovskite films. Furthermore, the most important optical parameters of solar cells, the current density ( J sc ), fill factor (FF), open-circuit voltage ( V oc ) and power conversion efficiencies (PCE) were improved. Especially, when the PCBM doping ratio in CH 3 NH 3 PbI 3 (MAPbI 3 ) precursor solution was 1 wt%, the device obtained the smallest V oc decay (less than 1%) in the p-i-n type PSCs with poly (3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) as hole transport layer (HTL) and fullerene (C 60 ) as electron transport layer (ETL). The PSCs V oc stability improvement is attri buted to enhanced crystallinity of photoactive layer and decreased non-radiative recombination by PCBM doping in the perovskites.
KeywordsSelf-PassivationSmall Open-Circuit Voltage LossPCBM
Dong, Q.F., Fang, Y.J., Shao, Y.C., Mulligan, P., Qiu, J., Cao, L. and Huang, J.S. (2015) Electron-Hole Diffusion Lengths > 175 μm in Solution-Grown CH3NH3PbI3 Single Crystals. Science, 347, 967-970. https://doi.org/10.1126/science.aaa5760
Zhao, Y. and Zhu, K. (2016) Organic-Inorganic Hybrid Lead Halide Perovskites for Optoelectronic and Electronic Applications. Chemical Society Review, 45, 655-689. https://doi.org/10.1039/C4CS00458B
Yang, W.S., Park, B.W., Jung, E.H., Jeon, N.J., Kim, Y.C., Lee, D.U., Shin, S.S., Seo, J., Kim, E.K., Noh, J.H. and Seok, S.I. (2017) Iodide Management in Formamidinium-Lead-Halide-Based Perovskite Layers for Efficient Solar Cells. Science, 356, 1376-1379. https://doi.org/10.1126/science.aan2301
Wu, W.-Q. and Wang, L.Z. (2019) A 3D Hybrid Nanowire/Microcuboid Optoelectronic Electrode for Maximised Light Harvesting in Perovskite Solar Cells. Journal of Materials Chemistry, 7, 932-939. https://doi.org/10.1039/C8TA09806A
Liu M., Johnston, M.B. and Snaith, H.J.J.N. (2013) Efficient Planar Heterojunction Perovskite Solar Cells by Vapour Deposition. Nature, 501, 395-398. https://doi.org/10.1038/nature12509
Shi, D., Adinolfi, V., Comin, R., Yuan, M., Alarousu, E., Buin, A., Chen, Y., Hoogland, S., Rothenberger, A., et al. (2015) Low Trap-State Density and Long Carrier Diffusion in Organolead Trihalide Perovskite Single Crystals. Science, 347, 519-522. https://doi.org/10.1126/science.aaa2725
Im, J.-H., Jang, I.-H., Pellet, N., Gratzel, M. and Park, N.-G. (2014) Growth of CH3NH3PbI3 Cuboids with Controlled Size for High-Efficiency Perovskite Solar Cells. Nature Nanotechnology, 9, 927-932. https://doi.org/10.1038/nnano.2014.181
Fan, J., Jia, B. and Gu, M. (2014) Perovskite-Based Low-Cost and High-Efficiency Hybrid Halide Solar Cells. Photonics Research, 2, 111-120. https://doi.org/10.1364/PRJ.2.000111
Kojima, A., Teshima, K., Shirai, Y. and Miyasaka, T. (2009) Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells. Journal of the American Chemical Society, 131, 6050-6051. https://doi.org/10.1021/ja809598r
National Renewable Energy Laboratory (NREL) Best Research-Cell Efficiencies. https://www.nrel.gov/pv/cell-efficiency.html
Chen, Q., Zhou, H., Hong, Z., Luo, S., Duan, H.-S., Wang, H.-H., Liu, Y., Li, G. and Yang, Y. (2013) Planar Heterojunction Perovskite Solar Cells via Vapor-Assisted Solution Process. Journal of the American Chemical Society, 136, 622-625. https://doi.org/10.1021/ja411509g
Meng, L., You, J., Guo, T.-F. and Yang, Y. (2015) Recent Advances in the Inverted Planar Structure of Perovskite Solar Cells. Accounts of Chemical Research, 49, 155-165. https://doi.org/10.1021/acs.accounts.5b00404
Jiang, Q., Zhang, L., Wang, H., Yang, X., Meng, J., Liu, H., Yin, Z., Wu, J., Zhang, X. and You, J. (2016) Enhanced Electron Extraction Using SnO2 for High-Efficiency Planar-Structure HC(NH2)2PbI3-Based Perovskite Solar Cells. Nature Energy 2, Article No. 16177. https://doi.org/10.1038/nenergy.2016.177
Seo, J., Park, S., Kim, Y.C., Jeon, N.J., Noh, J.H., Yoon, S.C. and Seok, S.I. (2014) Benefits of Very Thin PCBM and LiF Layers for Solution-Processed p-i-n Perovskite Solar Cells. Energy and Environmental Science, 7, 2642-2646. https://doi.org/10.1039/C4EE01216J
Liu, Z., Zhu, A., Cai, F., Tao, L., Zhou, Y., Zhao, Z., Chen, Q., Cheng, Y.-B. and Zhou, H.P. (2017) Nickel Oxide Nanoparticles for Efficient Hole Transport in p-i-n and n-i-p Perovskite Solar Cells. Journal of Materials Chemistry, 5, 6597-6605. https://doi.org/10.1039/C7TA01593C
Kim, H.-S. and Park, N.-G. (2014) Parameters Affecting I-V Hysteresis of CH3NH3PbI3 Perovskite Solar Cells: Effects of Perovskite Crystal Size and Mesoporous TiO2 Layer. Journal of Physical Chemistry Letter, 5, 2927-2934. https://doi.org/10.1021/jz501392m
Liu, D., Li, S., Zhang, P., Wang, Y., Zhang, R., Sarvari, H., Wang, F., Wu, J., Wang, Z. and Chen, Z.D. (2017) Efficient Planar Heterojunction Perovskite Solar Cells with Li-Doped Compact TiO2 Layer. Nano Energy, 31, 462-468. https://doi.org/10.1016/j.nanoen.2016.11.028
Liu, D., Li, Y., Yuan, J., Hong, Q., Shi, G., Yuan, D., Wei, J., Huang, C., Tang, J. and Fung, M.-K. (2017) Improved Performance of Inverted Planar Perovskite Solar Cells with F4-TCNQ Doped PEDOT: PSS Hole Transport Layers. Journal of Materials Chemistry, 5, 5701-5708. https://doi.org/10.1039/C6TA10212C
Zhao, Q., Wu, R., Zhang, Z., Xiong, J., He, Z., Fan, B., Dai, Z., Yang, B., Xue, X., et al. (2019) Achieving Efficient Inverted Planar Perovskite Solar Cells with Nondoped PTAA as a Hole Transport Layer. Organic Electronics, 71, 106-112. https://doi.org/10.1016/j.orgel.2019.05.019
Yang, S., Dai, J., Yu, Z., Shao, Y., Zhou, Y., Xiao, X., Zeng, X.C. and Huang, J.J. (2019) Tailoring Passivation Molecular Structures for Extremely Small Open-Circuit Voltage Loss in Perovskite Solar Cells. Journal of the American Chemical Society, 141, 5781-5787. https://doi.org/10.1021/jacs.8b13091
Xu, L., Chen, X., Jin, J., Liu, W., Dong, B., Bai, X., Song, H. and Reiss, P. (2019) Inverted Perovskite Solar Cells Employing Doped NiO Hole Transport Layers: A Review. Nano Energy, 63, Article ID: 103860. https://doi.org/10.1016/j.nanoen.2019.103860
Li, M., Xu, X., Xie, Y., Li, H.-W., Ma, Y., Cheng, Y. and Tsang, S.-W. (2019) Improving the Conductivity of Sol-Gel Derived NiOx with a Mixed Oxide Composite to Realize over 80% Fill Factor in Inverted Planar Perovskite Solar Cells. Journal of Materials Chemistry, 7, 9578-9586. https://doi.org/10.1039/C8TA10821H
Arora, N., Dar, M.I., Hinderhofer, A., Pellet, N., Schreiber, F., Zakeeruddin, S.M. and Gratzel, M. (2017) Perovskite Solar Cells with CuSCN Hole Extraction Layers Yield Stabilized Efficiencies Greater than 20%. Science, 358, 768-771. https://doi.org/10.1126/science.aam5655
Yu, Z. and Sun, L.C. (2018) Inorganic Hole-Transporting Materials for Perovskite Solar Cells. Small Methods, 2, Article ID: 1700280. https://doi.org/10.1002/smtd.201700280
Sun, W., Ye, S., Rao, H., Li, Y., Liu, Z., Xiao, L., Chen, Z., Bian, Z. and Huang, C. (2016) Room-Temperature and Solution-Processed Copper Iodide as the Hole Transport Layer for Inverted Planar Perovskite Solar Cells. Nanoscale, 8, 15954-15960. https://doi.org/10.1039/C6NR04288K
Bryant, D., Wheeler, S., O’Regan, B.C., Watson, T., Barnes, P.R., Worsley, D. and Durrant, J. (2015) Observable Hysteresis at Low Temperature in “Hysteresis Free” Organic-Inorganic Lead Halide Perovskite Solar Cells. Journal of Physical Chemistry Letters, 6, 3190-3194. https://doi.org/10.1021/acs.jpclett.5b01381
Xu, J., Buin, A., Ip, A.H., Li, W., Voznyy, O., Comin, R., Yuan, M., Jeon, S., Ning, Z., et al. (2015) Perovskite-Fullerene Hybrid Materials Suppress Hysteresis in Planar Diodes. Nature Communications, 6, Article No. 7081. https://doi.org/10.1038/ncomms8081
Shao, Y., Xiao, Z., Bi, C., Yuan, Y. and Huang, J. (2014) Origin and Elimination of Photocurrent Hysteresis by Fullerene Passivation in CH3NH3PbI3 Planar Heterojunction Solar Cells. Nature Communications, 5, Article No. 5784. https://doi.org/10.1038/ncomms6784
Chiang, C.-H. and Wu, C.-G. (2016) Bulk Heterojunction Perovskite-PCBM Solar Cells with High Fill Factor. Nature Photonics, 10, 196-200. https://doi.org/10.1038/nphoton.2016.3
Shockley, W. and Queisser, H.J. (1961) Detailed Balance Limit of Efficiency of p-n Junction Solar Cells. Journal of Applied Physics, 32, 510-519. https://doi.org/10.1063/1.1736034
Chen, C., Song, Z., Xiao, C., Zhao, D., Shrestha, N., Li, C., Yang, G., Yao, F., Zheng, X., et al. (2019) Achieving a High Open-Circuit Voltage in Inverted Wide-Bandgap Perovskite Solar Cells with a Graded Perovskite Homojunction. Nano Energy, 61, 141-147. https://doi.org/10.1016/j.nanoen.2019.04.069
Choi, K., Lee, J., Kim, H.I., Park, C.W., Kim, G.-W., Choi, H., Park, S., Park, S.A. and Park, T.J.E. (2018) Thermally Stable, Planar Hybrid Perovskite Solar Cells with High Efficiency. Energy and Environmental Science, 11, 3238-3247. https://doi.org/10.1039/C8EE02242A
Yang, B., Dyck, O., Poplawsky, J., Keum, J., Puretzky, A., Das, S., Ivanov, I., Rouleau, C., Duscher, G., Geohegan, D. and Xiao, K. (2015) Perovskite Solar Cells with near 100% Internal Quantum Efficiency Based on Large Single Crystalline Grains and Vertical Bulk Heterojunctions. Journal of the American Chemical Society, 137, 9210-9213. https://doi.org/10.1021/jacs.5b03144
Wu, W.-Q., Wang, Q., Fang, Y., Shao, Y., Tang, S., Deng, Y., Lu, H., Liu, Y., Li, T., Yang, Z., Gruverman, A. and Huang, J. (2018) Molecular Doping Enabled Scalable Blading of Efficient Hole-Transport-Layer-Free Perovskite Solar Cells. Nature Communications, 9, Article No. 1625. https://doi.org/10.1038/s41467-018-04028-8
Hou, F., Su, Z., Jin, F., Yan, X., Wang, L., Zhao, H., Zhu, J., Chu, B. and Li, W. (2015) Efficient and Stable Planar Heterojunction Perovskite Solar Cells with an MoO3/PEDOT: PSS Hole Transporting Layer. Nanoscale, 7, 9427-9432. https://doi.org/10.1039/C5NR01864A
Zuo, C. and Ding, L. (2017) Modified PEDOT Layer Makes a 1.52 V Voc for Perovskite/PCBM Solar Cells. Advanced Energy Materials, 7, Article ID: 1601193. https://doi.org/10.1002/aenm.201601193
Yan, W., Li, Y., Li, Y., Ye, S., Liu, Z., Wang, S., Bian, Z. and Huang, C. (2015) High-Performance Hybrid Perovskite Solar Cells with Open Circuit Voltage Dependence on Hole-Transporting Materials. Nano Energy, 16, 428-437. https://doi.org/10.1016/j.nanoen.2015.07.024
Sun, S., Salim, T., Mathews, N., Duchamp, M., Boothroyd, C., Xing, G., Sum, T.C. and Lam, Y.M. (2014) The Origin of High Efficiency in Low-Temperature Solution-Processable Bilayer Organometal Halide Hybrid Solar Cells. Energy and Environmental Science, 7, 399-407. https://doi.org/10.1039/C3EE43161D
D’innocenzo, V., Grancini, G., Alcocer, M.J., Kandada, A.R.S., Stranks, S.D., Lee, M.M., Lanzani, G., Snaith, H.J. and Petrozza, A. (2014) Excitons versus Free Charges in Organo-Lead Tri-Halide Perovskites. Nature Communications, 5, Article No. 3586. https://doi.org/10.1038/ncomms4586
Liu, M., Chen, Z., Yang, Y., Yip, H.-L. and Cao, Y. (2019) Reduced Open-Circuit Voltage Loss for Highly Efficient Low-Bandgap Perovskite Solar Cells via Suppression of Silver Diffusion. Journal of Materials Chemistry A, 7, 17324-17333. https://doi.org/10.1039/C9TA04366G
Yuan, J., Huang, T., Cheng, P., Zou, Y., Zhang, H., Yang, J.L., Chang, S.-Y., Zhang, Z., Huang, W., et al. (2019) Enabling Low Voltage Losses and High Photocurrent in Fullerene-Free Organic Photovoltaics. Nature Communications, 10, Article No. 570. https://doi.org/10.1038/s41467-019-08386-9
Li, W., Hendriks, K.H., Furlan, A., Wienk, M.M. and Janssen, R.A.J. (2015) High Quantum Efficiencies in Polymer Solar Cells at Energy Losses below 0.6 eV. Journal of the American Chemical Society, 137, 2231-2234. https://doi.org/10.1021/ja5131897
Zhao, Y., Li, Q., Zhou, W., Hou, Y., Zhao, Y., Fu, R., Yu, D., Liu, X. and Zhao, Q. (2019) Double-Side-Passivated Perovskite Solar Cells with Ultra-Low Potential Loss. Solar RRL, 3, Article ID: 1800296. https://doi.org/10.1002/solr.201800296