| 查看: 1295 | 回复: 8 | ||||
| 当前主题已经存档。 | ||||
[交流]
DIY染料敏化太阳能电池(图解)
|
||||
|
１．We start with 2 glass plates. Each plate is coated with TCO (or Transparent Coated Oxide). This is a thin coating which is electrically conducting in much the same way as metal wire. The TCO consists of SnO2:F (:F indicates that the tin oxide is doped with a very small amount of Fluor). The coating is transparent to enable light to pass through without loss. Doping is the process where small quantities of foreign atoms are introduced to control the electronic properties of semi conductors. The function of the TCO is to transport the current produced from the solar cell to the power consuming device. The Minus electrode goes by the name of ‘Photo electrode”  ２．A thin layer of TiO2 is coated on the photo electrode. This layer consists of a spongy 3 dimensional nano crystalline network. The layer itself has a thickness of 10 micrometer and is randomly stacked. Nano technology lies at the heart of this type of solar cell. The TiO2 particles are ‘grown’ from around 3 nm to approx. 20 nm which appears to be the most optimal size for this type of dye solar cell.  3.The dye molecules attach to the TiO2 particles.  4. The plus or counter electrode is provided with a thin graphite layer. The purpose of the graphite is to act as a catalyst.  5. The electrolyte is added. The electrolyte consists of Iodine (I2) and Sodium Iodide (NaI) dissolved in ethanol.  [ Last edited by leotron23 on 2006-8-23 at 18:45 ] |
回复此楼» 收录本帖的淘帖专辑推荐
 资料 |
» 猜你喜欢
职称评审没过，求安慰
已经有49人回复
-
26申博自荐
已经有3人回复
-
A期刊撤稿
已经有4人回复
-
垃圾破二本职称评审标准
已经有17人回复
-
投稿Elsevier的Neoplasia杂志，到最后选publishing options时页面空白，不能完成投稿
已经有22人回复
-
EST投稿状态问题
已经有7人回复
-
毕业后当辅导员了，天天各种学生超烦
已经有4人回复
-
三无产品还有机会吗
已经有6人回复
6.The electrical circuit is completed. The solar cell kit contains both a calculator and melody module to actually show that power is being generated and used. A multimeter is included to measure resistance, voltage and current generated. The actual working of the dye solar cell is contained in a further series of slides.  7.Dye molecules chemically attach to the TiO2 particles when the negative electrode is submerged in the liquid dye. The transformation of photon energy into electrical current occurs in sequence as shown in the following slides:  8.A small amount of light is absorbed by the dye molecules.  9.The photon energy present is transferred to single electrons in the dye molecules.  10.Upon transfer of photon energy, the single electrons become mobile and able to leave their defined bonds.  |
2楼2006-08-23 18:50:35
11.The electrons have sufficient energy to migrate thru the TiO2 and TCO layers to the power consuming device.  12. The device now is able to function as designed.  13.A closed circuit is required for electrical current to run, that is once the electrons have shed their energy they must return to the point of release. This is the task of the counter electrode which absorbs the electrons from the power consuming device. These electrons return - by means of the electrolyte - to the dye molecules from which they were released.  14.To realize this a counter electrode is required to absorb the electrons from the energy consuming device. The electrons are transferred to ions present in the liquid electrolyte. To enable this transfer to occur smoothly a catalyst is required. This is the function of the graphite deposited on the TCO of the counter electrode.  15.The ‘charged’ ions carry the electrons thru the liquid and pores of the Tio2 ‘sponge’ until they get to the dye molecules short of electrons. The electrons now transfer from the ions to the dye molecules. This step closes the electrical circuit so the process is able to repeat itself.  |
3楼2006-08-23 18:53:30
photonic
铁杆木虫 (著名写手)
- 应助: 8 (幼儿园)
- 金币: 7643.5
- 散金: 100
- 红花: 4
- 帖子: 1386
- 在线: 130.2小时
- 虫号: 91218
- 注册: 2005-09-04
- 性别: GG
- 专业: 光学
4楼2006-08-24 00:37:24
longriver1
禁虫 (小有名气)
|
本帖内容被屏蔽 |
5楼2006-10-18 13:40:13
jerryls
铁杆木虫 (小有名气)
- 应助: 1 (幼儿园)
- 金币: 5675.4
- 散金: 837
- 红花: 6
- 帖子: 218
- 在线: 429.2小时
- 虫号: 90556
- 注册: 2005-09-02
- 性别: GG
- 专业: 物理化学
6楼2006-10-19 05:15:50
westwolf
木虫 (著名写手)
- 应助: 3 (幼儿园)
- 贵宾: 2.5
- 金币: 3732.4
- 散金: 954
- 红花: 5
- 帖子: 1338
- 在线: 55.4小时
- 虫号: 120650
- 注册: 2005-12-03
- 性别: GG
- 专业: 无机非金属基复合材料
7楼2006-10-19 07:09:20
8楼2006-10-19 11:04:15
9楼2006-10-19 23:13:44