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Impact of Chemical Doping on Optical Responses in Bismuth-Doped CH3NH3PbBr3 Single Crystals: Carrier Lifetime and Photon Recycling
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.jpclett.7b02508 Yasuhiro Yamada 1 , Mizuki Hoyano 1 , Ryo Akashi 1 , Kenichi Oto 1 , Yoshihiko Kanemitsu 2
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.jpclett.7b02508 Yasuhiro Yamada 1 , Mizuki Hoyano 1 , Ryo Akashi 1 , Kenichi Oto 1 , Yoshihiko Kanemitsu 2
Affiliation
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We studied the optical responses of organic–inorganic halide perovskite CH3NH3PbBr3 single crystals doped with heterovalent Bi3+ ions (electron densities up to 2.3 × 1012 cm–3). The Bi doping causes no significant changes in the band gap energy but leads to an enhanced Urbach tail and photoluminescence blue shift. On the basis of the time-resolved photoluminescence measurements, we attribute the PL response to a shorter carrier lifetime induced by Bi doping, which results in a reduced photon recycling effect (i.e., the repeated emission and reabsorption of photons inside the crystal). We discuss the physical relation between Bi concentration and the optical and electric properties of Bi-doped CH3NH3PbBr3 and reveal the unique nature of the Bi3+ ion as a dopant in halide perovskites.
中文翻译：
化学掺杂对掺铋的CH 3 NH 3 PbBr 3单晶中光学响应的影响：载流子寿命和光子循环
我们研究了杂化Bi 3+离子（电子密度高达2.3×10 12 cm –3）掺杂的有机-无机卤化物钙钛矿CH 3 NH 3 PbBr 3单晶的光学响应。）。Bi掺杂不会使带隙能量发生显着变化，但会导致Urbach尾部增强和光致发光蓝移。根据时间分辨的光致发光测量，我们将PL响应归因于Bi掺杂引起的较短的载流子寿命，这会导致光子再循环效应降低（即晶体内部光子的重复发射和重吸收）。我们讨论了Bi浓度与Bi掺杂的CH 3 NH 3 PbBr 3的光学和电学性质之间的物理关系，并揭示了Bi 3+离子作为卤化物钙钛矿中掺杂剂的独特性质。
更新日期：2017-11-16
中文翻译：
化学掺杂对掺铋的CH 3 NH 3 PbBr 3单晶中光学响应的影响：载流子寿命和光子循环
我们研究了杂化Bi 3+离子（电子密度高达2.3×10 12 cm –3）掺杂的有机-无机卤化物钙钛矿CH 3 NH 3 PbBr 3单晶的光学响应。）。Bi掺杂不会使带隙能量发生显着变化，但会导致Urbach尾部增强和光致发光蓝移。根据时间分辨的光致发光测量，我们将PL响应归因于Bi掺杂引起的较短的载流子寿命，这会导致光子再循环效应降低（即晶体内部光子的重复发射和重吸收）。我们讨论了Bi浓度与Bi掺杂的CH 3 NH 3 PbBr 3的光学和电学性质之间的物理关系，并揭示了Bi 3+离子作为卤化物钙钛矿中掺杂剂的独特性质。
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